Fix variable name.

Author: mluis1

src/apps/LoRaMac/classB/SAML21/main.c

@@ -482,7 +482,7 @@ static bool SendFrame( void )
 
     if( status == LORAMAC_STATUS_DUTYCYCLE_RESTRICTED )
     {
-        TimerTime_t nextTxInIn = 0;
+        TimerTime_t nextTxIn = 0;
         LoRaMacQueryNextTxDelay( LORAWAN_DEFAULT_DATARATE, &nextTxIn );
         printf( "Next Tx in  : ~%lu second(s)\r\n", ( nextTxIn / 1000 ) );
     }

src/apps/LoRaMac/classC/NucleoL476/main.c

@@ -346,7 +346,7 @@ static void JoinNetwork( void )
         if( status == LORAMAC_STATUS_DUTYCYCLE_RESTRICTED )
         {
             TimerTime_t nextTxIn = 0;
-            LoRaMacQueryNextTxDelay( LORAWAN_DEFAULT_DATARATE, &nextTxInIn );
+            LoRaMacQueryNextTxDelay( LORAWAN_DEFAULT_DATARATE, &nextTxIn );
             printf( "Next Tx in  : ~%lu second(s)\r\n", ( nextTxIn / 1000 ) );
         }
         DeviceState = DEVICE_STATE_CYCLE;

src/apps/LoRaMac/classC/SKiM880B/main.c

@@ -465,7 +465,7 @@ static bool SendFrame( void )
     if( status == LORAMAC_STATUS_DUTYCYCLE_RESTRICTED )
     {
         TimerTime_t nextTxIn = 0;
-        LoRaMacQueryNextTxDelay( LORAWAN_DEFAULT_DATARATE, &nextTxInIn );
+        LoRaMacQueryNextTxDelay( LORAWAN_DEFAULT_DATARATE, &nextTxIn );
         printf( "Next Tx in  : ~%lu second(s)\r\n", ( nextTxIn / 1000 ) );
     }