fix for mac build and possible crash when responding to notification twice

indra/llui/llnotifications.cpp

@@ -600,7 +600,7 @@ void LLNotification::respond(const LLSD& response)
 	{
 		mResponder->handleRespond(asLLSD(), response);
 	}
-	else
+	else if (!mResponseFunctorName.empty())
 	{
 		// look up the functor
 		LLNotificationFunctorRegistry::ResponseFunctor functor =
@@ -608,6 +608,11 @@ void LLNotification::respond(const LLSD& response)
 		// and then call it
 		functor(asLLSD(), response);
 	}
+	else
+	{
+		// no registered responder
+		return;
+	}
 
 	if (mTemporaryResponder && !isReusable())
 	{

indra/newview/llmediactrl.cpp

@@ -77,7 +77,7 @@ LLMediaCtrl::Params::Params()
 
 LLMediaCtrl::LLMediaCtrl( const Params& p) :
 	LLPanel( p ),
-	LLInstanceTracker(LLUUID::generateNewID()),
+	LLInstanceTracker<LLMediaCtrl, LLUUID>(LLUUID::generateNewID()),
 	mTextureDepthBytes( 4 ),
 	mBorder(NULL),
 	mFrequentUpdates( true ),