parse_args.c never says "the -E option is not valid in edit mode"

This is because we are checking the wrong variable.

Author: SiliconA-Z

src/parse_args.c

@@ -563,7 +563,7 @@ parse_args(int argc, char **argv, const char *shell, int *old_optind,
 	usage();
     if (mode == MODE_EDIT &&
        (ISSET(flags, MODE_PRESERVE_ENV) || extra_env.env_len != 0)) {
-	if (ISSET(mode, MODE_PRESERVE_ENV))
+	if (ISSET(flags, MODE_PRESERVE_ENV))
 	    sudo_warnx("%s", U_("the -E option is not valid in edit mode"));
 	if (extra_env.env_len != 0)
 	    sudo_warnx("%s",