Default argument for compatibility with old sketches

Author: PaintYourDragon

DHT.h

@@ -29,7 +29,7 @@ class DHT {
  public:
   DHT(uint8_t pin, uint8_t type);
   void begin(void);
-  float readTemperature(bool);
+  float readTemperature(bool S=false);
   float convertCtoF(float);
   float readHumidity(void);