Bug 899769 - Fix build of AudioManager.cpp when bluetooth is disabled, r=rlin

dom/system/gonk/AudioManager.cpp

@@ -174,6 +174,7 @@ AudioManager::HandleBluetoothStatusChanged(nsISupports* aSubject,
                                            const char* aTopic,
                                            const nsCString aAddress)
 {
+#ifdef MOZ_B2G_BT
   bool status;
   if (!strcmp(aTopic, BLUETOOTH_SCO_STATUS_CHANGED_ID)) {
     BluetoothHfpManager* hfp =
@@ -221,6 +222,7 @@ AudioManager::HandleBluetoothStatusChanged(nsISupports* aSubject,
     AudioSystem::setDeviceConnectionState(AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET,
                                           audioState, aAddress.get());
   }
+#endif
 }
 
 nsresult