radio_status: change 'fixed' field name to 'fix' so it does not clash with 'fixed' floating-point notation on the IDL generation

msg/radio_status.msg

@@ -10,4 +10,4 @@ uint8 noise				# background noise level
 uint8 remote_noise			# remote background noise level
 uint16 rxerrors				# receive errors
 
-uint16 fixed				# count of error corrected packets
+uint16 fix				# count of error corrected packets

src/modules/mavlink/mavlink_main.cpp

@@ -2807,7 +2807,7 @@ Mavlink::display_status()
 			printf("\t  noise:\t%d\n", _rstatus.noise);
 			printf("\t  remote noise:\t%u\n", _rstatus.remote_noise);
 			printf("\t  rx errors:\t%u\n", _rstatus.rxerrors);
-			printf("\t  fixed:\t%u\n", _rstatus.fixed);
+			printf("\t  fixed:\t%u\n", _rstatus.fix);
 			break;
 
 		case telemetry_status_s::TELEMETRY_STATUS_RADIO_TYPE_USB:

src/modules/mavlink/mavlink_receiver.cpp

@@ -1504,7 +1504,7 @@ MavlinkReceiver::handle_message_radio_status(mavlink_message_t *msg)
 		status.noise = rstatus.noise;
 		status.remote_noise = rstatus.remnoise;
 		status.rxerrors = rstatus.rxerrors;
-		status.fixed = rstatus.fixed;
+		status.fix = rstatus.fixed;
 
 		_mavlink->update_radio_status(status);