(main): Cast isdigit argument to unsigned char.

diff --git a/lib-src/emacsclient.c b/lib-src/emacsclient.c
index b63a4d2bf50eebf22de7fd85237bc84431dbf20b..988bfc4fd4d8fbc682554c8a5fea6aa0ef6cbbbc 100644 (file)
--- a/lib-src/emacsclient.c
+++ b/lib-src/emacsclient.c
@@ -425,7 +425,7 @@ main (argc, argv)
       if (*argv[i] == '+')
        {
          char *p = argv[i] + 1;
-         while (isdigit (*p) || *p == ':') p++;
+         while (isdigit ((unsigned char) *p) || *p == ':') p++;
          if (*p != 0)
            fprintf (out, "%s/", quote_file_name (cwd));
        }