Fix linux build after latest changes

source/backend/plugin/CarlaPluginJack.cpp

@@ -1,6 +1,6 @@
 /*
  * Carla Plugin JACK
- * Copyright (C) 2016-2017 Filipe Coelho <falktx@falktx.com>
+ * Copyright (C) 2016-2018 Filipe Coelho <falktx@falktx.com>
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
@@ -221,9 +221,11 @@ public:
     {
         carla_debug("CarlaPluginJack::~CarlaPluginJack()");
 
+#ifndef BUILD_BRIDGE
         // close UI
         if (pData->hints & PLUGIN_HAS_CUSTOM_UI)
             pData->transientTryCounter = 0;
+#endif
 
         pData->singleMutex.lock();
         pData->masterMutex.lock();