Resolve compiler warnings about misleading indentation

This change is targeted at specific lines of code reported by GCC or
Clang as potentially causing unintended behavior.

backend/dll.c

@@ -1068,7 +1068,7 @@ sane_get_devices (const SANE_Device *** device_list, SANE_Bool local_only)
   char *full_name;
   int i, num_devs;
   size_t len;
-#define ASSERT_SPACE(n)                                                    \
+#define ASSERT_SPACE(n) do                                                 \
   {                                                                        \
     if (devlist_len + (n) > devlist_size)                                  \
       {                                                                    \
@@ -1080,7 +1080,7 @@ sane_get_devices (const SANE_Device *** device_list, SANE_Bool local_only)
         if (!devlist)                                                      \
           return SANE_STATUS_NO_MEM;                                       \
       }                                                                    \
-  }
+  } while (0)
 
   DBG (3, "sane_get_devices\n");
 

backend/genesys/genesys.cpp

@@ -2847,7 +2847,8 @@ static void compute_averaged_planar(Genesys_Device * dev, const Genesys_Sensor&
     avgpixels = 15;
 
   /* LiDE80 packs shading data */
-    if (dev->model->sensor_id != SensorId::CIS_CANON_LIDE_80) {
+  if (dev->model->sensor_id != SensorId::CIS_CANON_LIDE_80)
+    {
       factor=1;
       fill=avgpixels;
     }
@@ -4888,23 +4889,23 @@ static void init_options(Genesys_Scanner* s)
   s->opt[OPT_EXTRA_SW].desc = SANE_I18N("Extra button");
   s->opt[OPT_EXTRA_SW].type = SANE_TYPE_BOOL;
   s->opt[OPT_EXTRA_SW].unit = SANE_UNIT_NONE;
-    if (model->buttons & GENESYS_HAS_EXTRA_SW) {
-        s->opt[OPT_EXTRA_SW].cap = SANE_CAP_SOFT_DETECT | SANE_CAP_HARD_SELECT | SANE_CAP_ADVANCED;
-    } else {
+  if (model->buttons & GENESYS_HAS_EXTRA_SW)
+    s->opt[OPT_EXTRA_SW].cap =
+      SANE_CAP_SOFT_DETECT | SANE_CAP_HARD_SELECT | SANE_CAP_ADVANCED;
+  else
     s->opt[OPT_EXTRA_SW].cap = SANE_CAP_INACTIVE;
-    }
 
-    // transparency/scan_film button
+  /* transparency/scan_film button */
   s->opt[OPT_TRANSP_SW].name = "transparency";
   s->opt[OPT_TRANSP_SW].title = SANE_I18N ("Transparency button");
   s->opt[OPT_TRANSP_SW].desc = SANE_I18N ("Transparency button");
   s->opt[OPT_TRANSP_SW].type = SANE_TYPE_BOOL;
   s->opt[OPT_TRANSP_SW].unit = SANE_UNIT_NONE;
-    if (model->buttons & GENESYS_HAS_TRANSP_SW) {
-        s->opt[OPT_TRANSP_SW].cap = SANE_CAP_SOFT_DETECT | SANE_CAP_HARD_SELECT | SANE_CAP_ADVANCED;
-    } else {
+  if (model->buttons & GENESYS_HAS_TRANSP_SW)
+    s->opt[OPT_TRANSP_SW].cap =
+      SANE_CAP_SOFT_DETECT | SANE_CAP_HARD_SELECT | SANE_CAP_ADVANCED;
+  else
     s->opt[OPT_TRANSP_SW].cap = SANE_CAP_INACTIVE;
-    }
 
   /* calibration needed */
   s->opt[OPT_NEED_CALIBRATION_SW].name = "need-calibration";

backend/ibm.c

@@ -568,7 +568,8 @@ sane_init (SANE_Int * version_code, SANE_Auth_Callback authorize)
             continue;                   /* ignore empty lines */
 
 	  /* skip white space: */
-	  for (lp = line; isspace(*lp); ++lp);
+	  for (lp = line; isspace(*lp); ++lp)
+            ;
           strcpy (devnam, lp);
         }
       fclose (fp);

backend/kodakaio.c

@@ -716,7 +716,6 @@ That is probably if the scanner disconnected the network connection
 			/* pollreply is -ve */
 			DBG(1, "net poll error\n");
 		*status = SANE_STATUS_IO_ERROR;
-		return read;
 	}
 	else if((fds[0].revents & POLLIN) && !(fds[0].revents & (POLLERR | POLLHUP | POLLNVAL))) {
 		while (read < wanted) {
@@ -733,11 +732,10 @@ That is probably if the scanner disconnected the network connection
 			*status = SANE_STATUS_IO_ERROR;
 
 		DBG(32, "net read %lu bytes:%x,%x,%x,%x,%x,%x,%x,%x\n",(unsigned long)read,buf[0],buf[1],buf[2],buf[3],buf[4],buf[5],buf[6],buf[7]);
-
-		return read;
 	}
 	else
 		DBG(1, "Unknown problem with poll\n");
+
 	return read;
 }
 

backend/net.c

@@ -1201,7 +1201,7 @@ sane_get_devices (const SANE_Device *** device_list, SANE_Bool local_only)
   char *full_name;
   int i, num_devs;
   size_t len;
-#define ASSERT_SPACE(n)                                                    \
+#define ASSERT_SPACE(n) do                                                 \
   {                                                                        \
     if (devlist_len + (n) > devlist_size)                                  \
       {                                                                    \
@@ -1216,7 +1216,7 @@ sane_get_devices (const SANE_Device *** device_list, SANE_Bool local_only)
              return SANE_STATUS_NO_MEM;                                    \
           }                                                                \
       }                                                                    \
-  }
+  } while (0)
 
   DBG (3, "sane_get_devices: local_only = %d\n", local_only);
 

backend/pixma/pixma_mp730.c

@@ -432,10 +432,10 @@ step1 (pixma_t * s)
                 int tmo = 10;  /* like Windows driver, 10 sec CCD calibration ? */
                 while (--tmo >= 0)
                   {
-                    error = handle_interrupt (s, 1000);		\
-                    if (s->cancel)				\
-                      return PIXMA_ECANCELED;			\
-                    if (error != PIXMA_ECANCELED && error < 0)	\
+                    error = handle_interrupt (s, 1000);
+                    if (s->cancel)
+                      return PIXMA_ECANCELED;
+                    if (error != PIXMA_ECANCELED && error < 0)
                       return error;
                     PDBG (pixma_dbg (2, "CCD Calibration ends in %d sec.\n", tmo));
                   }

backend/plustek-pp_motor.c

@@ -3216,7 +3216,8 @@ _LOC void MotorP98003BackToHomeSensor( pScanData ps )
 	MiscStartTimer( &timer, _SECOND * 2 );
 
     while(!(IOGetScanState( ps, _TRUE ) & _SCANSTATE_STOP) &&
-                                                    !MiscCheckTimer( &timer ));
+                                                     !MiscCheckTimer( &timer ))
+	    ;
 
     _DODELAY( 1000UL );
 
@@ -3324,7 +3325,8 @@ _LOC void MotorP98003PositionYProc( pScanData ps, ULong steps)
 	MiscStartTimer( &timer, _SECOND * 5 );
 
     while(!(IOGetScanState( ps, _TRUE ) & _SCANSTATE_STOP) &&
-                                                (!MiscCheckTimer( &timer )));
+                                                     !MiscCheckTimer( &timer ))
+	    ;
 
     _DODELAY( 12 );
 

backend/ricoh.c

@@ -514,7 +514,8 @@ sane_init (SANE_Int * version_code, SANE_Auth_Callback authorize)
             continue;                   /* ignore empty lines */
 
 	  /* skip white space: */
-	  for (lp = line; isspace(*lp); ++lp);
+	  for (lp = line; isspace(*lp); ++lp)
+            ;
           strcpy (devnam, lp);
         }
       fclose (fp);