Fixing compiler warnings

backend/dll.c

@@ -164,7 +164,7 @@ struct backend
   u_int loaded:1;		/* are the functions available? */
   u_int inited:1;		/* has the backend been initialized? */
   void *handle;			/* handle returned by dlopen() */
-  void *(*op[NUM_OPS]) ();
+  void *(*op[NUM_OPS]) (void);
 };
 
 #define BE_ENTRY(be,func)       sane_##be##_##func

backend/microtek.c

@@ -3357,7 +3357,7 @@ sane_control_option (SANE_Handle handle,
   SANE_Status status;
 
   DBG(96, "sane_control_option (opt=%d,act=%d,val=%p,info=%p)\n",
-      option, action, value, info);
+      option, action, value, (void*) info);
 
   sod = scanner->sod;
   val = scanner->val;

backend/umax1220u.c

@@ -797,7 +797,7 @@ sane_control_option (SANE_Handle handle, SANE_Int option,
 
   DBG (3,
        "sane_control_option: handle=%p, opt=%d, act=%d, val=%p, info=%p\n",
-       handle, option, action, value, info);
+       handle, option, action, value, (void*) info);
 
   return dispatch_control_option (handle, option, action, value, info);
 }

sanei/sanei_wire.c

@@ -487,7 +487,7 @@ sanei_w_device_ptr (Wire * w, SANE_Device ** v)
   DBG (3, "sanei_w_device_ptr: wire %d\n", w->io.fd);
   sanei_w_ptr (w, (void **) v, (WireCodecFunc) sanei_w_device, sizeof (**v));
   if (w->direction != WIRE_FREE)
-    DBG (4, "sanei_w_device_ptr: device struct at %p\n", *v);
+    DBG (4, "sanei_w_device_ptr: device struct at %p\n", (void*) *v);
 }
 
 void