incorrect set button period to 0, cause issue creating timer

Author: hathach

libraries/BLEAdafruitService/src/services/BLEAdafruitButton.h

@@ -30,7 +30,7 @@ class BLEAdafruitButton : public BLEAdafruitSensor
   public:
     static const uint8_t UUID128_SERVICE[16];
     static const uint8_t UUID128_CHR_DATA[16];
-    static const int32_t DEFAULT_PERIOD = 0;
+    static const int32_t DEFAULT_PERIOD = 100;
 
     BLEAdafruitButton(void);
     virtual err_t begin(void);