Add missing comment to vairable LastTxChannel

Daniel Jäckle · Daniel Jäckle · commit 14877f184ced · 2016-06-22T08:28:23.000+02:00
diff --git a/src/mac/LoRaMac.c b/src/mac/LoRaMac.c
@@ -426,6 +426,9 @@ static bool DutyCycleOn;
  */
 static uint8_t Channel;
 
+/*!
+ * Channel index of the last transmission
+ */
 static uint8_t LastTxChannel;
 
 /*!
