Fix uninitialised variable use in GS title bar

When the GS plugin is suspended and resumed, PCSX2 will set GS frame
title using an uninitialised array, making it prone to crashing in
those situations. Initialise the array.

pcsx2/gui/FrameForGS.cpp

@@ -558,6 +558,7 @@ void GSFrame::OnUpdateTitle( wxTimerEvent& evt )
 	double fps = wxGetApp().FpsManager.GetFramerate();
 
 	char gsDest[128];
+	gsDest[0] = 0; // No need to set whole array to NULL.
 	GSgetTitleInfo2( gsDest, sizeof(gsDest) );
 
 	const wxChar* limiterStr = L"None";