Fix cppcheck warning in aor

aor/aor.h

@@ -24,7 +24,7 @@
 
 #include <hamlib/rig.h>
 
-#define BACKEND_VER "0.6"
+#define BACKEND_VER "0.7"
 
 
 int format8k_mode(RIG *rig, char *buf, rmode_t mode, pbwidth_t width);

aor/ar7030p.c

@@ -406,10 +406,10 @@ static int ar7030p_open(RIG *rig)
             {
                 rc = getFilterBW(rig, i);
 
-                if (0 > rc)
+                if (rc < 0)
                 {
-                    rc = -RIG_EIO;
-                    break;
+                    rig_debug(RIG_DEBUG_ERR,"%s: err in getFilterBW: %s\n",__func__, strerror(rc));
+                    return rc;
                 }
                 else
                 {

aor/ar7030p_utils.c

@@ -1111,7 +1111,7 @@ int getCalLevel(RIG *rig, unsigned char rawAgc, int *dbm)
  */
 int getFilterBW(RIG *rig, enum FILTER_e filter)
 {
-    int rc = -1;
+    int rc;
     unsigned char bw;
 
     rc = readByte(rig, BBRAM, (FL_BW + ((filter - 1) * 4)), &bw);
@@ -1122,7 +1122,8 @@ int getFilterBW(RIG *rig, enum FILTER_e filter)
     }
     else
     {
-        rc = -1;
+        rig_debug(RIG_DEBUG_ERR, "%s: readByte err: %s\n", __func__, strerror(rc));
+        return rc;
     }
 
     rig_debug(RIG_DEBUG_VERBOSE, "%s: filter %1d BW %5d\n", __func__, filter, rc);