- cleanup of masterserver global flag

- attempt to cut down on resources required for masterserver mode to minimize RAM

source/shared_lib/sources/graphics/model_manager.cpp

@@ -15,9 +15,12 @@
 #include "graphics_factory.h"
 #include <cstdlib>
 #include <stdexcept>
+#include "util.h"
 
 #include "leak_dumper.h"
 
+using namespace Shared::Util;
+
 namespace Shared{ namespace Graphics{
 
 // =====================================================
@@ -25,6 +28,7 @@ namespace Shared{ namespace Graphics{
 // =====================================================
 
 ModelManager::ModelManager(){
+	assert(GlobalStaticFlags::getIsNonGraphicalModeEnabled() == false);
 	textureManager= NULL;
 }