- Backend update from Raze.

Mainly optimizations for the sound system and texture manager.

src/common/engine/i_interface.h

@@ -46,6 +46,7 @@ struct SystemCallbacks
 	void (*LanguageChanged)(const char*);
 	bool (*OkForLocalization)(FTextureID, const char*);
 	FConfigFile* (*GetConfig)();
+	bool (*WantEscape)();
 };
 
 extern SystemCallbacks sysCallbacks;