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

code/q3_ui/ui_local.h

@@ -623,7 +623,7 @@ void UI_SPSkillMenu_Cache( void );
 // ui_syscalls.c
 //
 void			trap_Print( const char *string );
-void			trap_Error( const char *string );
+void			trap_Error( const char *string ) __attribute__((noreturn));
 int				trap_Milliseconds( void );
 void			trap_Cvar_Register( vmCvar_t *vmCvar, const char *varName, const char *defaultValue, int flags );
 void			trap_Cvar_Update( vmCvar_t *vmCvar );