RadioLib's startChannel returns LORA_DETECTED for SX126x and SX128x (#2293)

src/mesh/SX128xInterface.cpp

@@ -222,7 +222,7 @@ template <typename T> bool SX128xInterface<T>::isChannelActive()
 
     setStandby();
     result = lora.scanChannel();
-    if (result == RADIOLIB_PREAMBLE_DETECTED)
+    if (result == RADIOLIB_LORA_DETECTED)
         return true;
 
     assert(result != RADIOLIB_ERR_WRONG_MODEM);