Issue 416: RC_Channel – Fix to make dead_zones still output 0

libraries/RC_Channel/RC_Channel.cpp

@@ -247,6 +247,8 @@ RC_Channel::pwm_to_range()
 
 	if(radio_in > radio_trim_low)
 		return (_low + ((long)(_high - _low) * (long)(radio_in - radio_trim_low)) / (long)(radio_max - radio_trim_low));
+	else if(_dead_zone > 0)
+		return 0;
 	else
 		return _low;
 }