some minor correction after codacy checks (#82)

need to merge it before RFM69 pull request

ZsensorBH1750.ino

@@ -1,4 +1,4 @@
-/*  
+  /*  
   OpenMQTTGateway Addon  - ESP8266 or Arduino program for home automation 
 
    Act as a wifi or ethernet gateway between your 433mhz/infrared IR signal  and a MQTT broker 
@@ -110,7 +110,7 @@ void MeasureLightIntensity()
       // Generate Lux
       if(Lux != persistedll || bh1750_always){
         char lux[7];
-        sprintf(lux,"%d",Lux);
+        sprintf(lux,"%u",Lux);
         trc(F("Sending Lux to MQTT"));
         trc(String(lux));
         client.publish(LUX,lux);