- tag more functions with gnu format attribute

- fix format string bugs. still some left

code/client/cl_main.c

@@ -993,7 +993,7 @@ void CL_Setenv_f( void ) {
 		if ( env ) {
 			Com_Printf( "%s=%s\n", Cmd_Argv(1), env );
 		} else {
-			Com_Printf( "%s undefined\n", Cmd_Argv(1), env );
+			Com_Printf( "%s undefined\n", Cmd_Argv(1));
 		}
 	}
 }