Bug 5094 - Code cleanup, patch by Zack Middleton and DevHC. Fixes unused-but-set gcc warnings

code/renderer/tr_public.h

@@ -109,7 +109,7 @@ typedef struct {
 	void	(QDECL *Printf)( int printLevel, const char *fmt, ...) __attribute__ ((format (printf, 2, 3)));
 
 	// abort the game
-	void	(QDECL *Error)( int errorLevel, const char *fmt, ...) __attribute__ ((format (printf, 2, 3)));
+	void	(QDECL *Error)( int errorLevel, const char *fmt, ...) __attribute__ ((noreturn, format (printf, 2, 3)));
 
 	// milliseconds should only be used for profiling, never
 	// for anything game related.  Get time from the refdef