use const reference in constructor for GattService

Author: Rohit Grover

GattService.cpp

@@ -36,7 +36,7 @@
     @endcode
 */
 /**************************************************************************/
-GattService::GattService(UUID uuid) : primaryServiceID(uuid), characteristicCount(0), characteristics(), handle(0)
+GattService::GattService(const UUID &uuid) : primaryServiceID(uuid), characteristicCount(0), characteristics(), handle(0)
 {
     /* empty */
 }

GattService.h

@@ -34,7 +34,7 @@ class GattService
 private:
 
 public:
-    GattService(UUID uuid);
+    GattService(const UUID &uuid);
     virtual ~GattService(void);
 
     ble_error_t addCharacteristic(GattCharacteristic &);