Issue #557 fixed (Antenna defective warning when no XJT module started)

radio/src/telemetry/frsky_sport.cpp

@@ -661,7 +661,7 @@ void telemetryWakeup()
     alarmsCheckTime = get_tmr10ms() + 100; /* next check in 1second */
 
     if (alarmsCheckStep == 0) {
-      if (frskyData.rssi[1].value > 0x33) {
+      if ((IS_MODULE_XJT(0) || IS_MODULE_XJT(1)) && frskyData.rssi[1].value > 0x33) {
         AUDIO_SWR_RED();
         s_global_warning = STR_ANTENNAPROBLEM;
         alarmsCheckTime = get_tmr10ms() + 300; /* next check in 3seconds */