Remove set but unused variable errors in aor.

aor/ar5000.c

@@ -403,7 +403,6 @@ int format5k_mode(RIG *rig, char *buf, rmode_t mode, pbwidth_t width)
 	case RIG_MODE_WFM:
 	case RIG_MODE_FM:  aormode = AR5K_FM; break;
 	case RIG_MODE_LSB: aormode = AR5K_LSB; break;
-	case RIG_MODE_SSB:
 	case RIG_MODE_USB: aormode = AR5K_USB; break;
 	case RIG_MODE_CW:  aormode = AR5K_CW; break;
 	case RIG_MODE_SAM: aormode = AR5K_SAM; break;

aor/ar7030.c

@@ -83,7 +83,11 @@ static int rxr_readByte(RIG *rig)
   unsigned char buf[] = {0x71}; // Read command
   int retval;
   retval = write_block(&rig->state.rigport, (char *) buf, 1);
+  if (retval != RIG_OK)
+    return retval;
   retval = read_block(&rig->state.rigport, (char *) response, 1);
+  if (retval != RIG_OK)
+    return retval;
   return response[0];
 }
 
@@ -258,7 +262,11 @@ static int Execute_Routine_14(RIG *rig)
   unsigned char buf[] = {0x2e}; // Read command
   int retval;
   retval = write_block(&rig->state.rigport, (char *) buf, 1);
+  if (retval != RIG_OK)
+    return retval;
   retval = read_block(&rig->state.rigport, (char *) response, 1);
+  if (retval != RIG_OK)
+    return retval;
   return response[0];
 }