Merge remote-tracking branch 'upstream/master'

Utilities.h

@@ -677,7 +677,7 @@ void kiss_indicate_implicit_length() {
 }
 
 void kiss_indicate_txpower(RadioInterface* radio) {
-    uint8_t txp = radio->getTxPower();
+    int8_t txp = radio->getTxPower();
 	serial_write(FEND);
 	serial_write(CMD_TXPOWER);
 	serial_write(txp);

freeNode_Firmware.ino

@@ -708,7 +708,7 @@ void serialCallback(uint8_t sbyte) {
       if (sbyte == 0xFF) {
         kiss_indicate_txpower(selected_radio);
       } else {
-        int txp = sbyte;
+        int8_t txp = (int8_t)sbyte;
 
         if (op_mode == MODE_HOST) setTXPower(selected_radio, txp);
         kiss_indicate_txpower(selected_radio);