format-patch: improve head calculation for cover-letter

diff --git a/archive.c b/archive.c
index 93e00bb4ae8ff9637be9e55fd41536b8837c3ba2..d254fa5d5cc32b0254dc863d015bc3d97dc59681 100644 (file)
--- a/archive.c
+++ b/archive.c
@@ -234,7 +234,7 @@ static void parse_pathspec_arg(const char **pathspec,
        ar_args->pathspec = pathspec = get_pathspec("", pathspec);
        if (pathspec) {
                while (*pathspec) {
-                       if (!path_exists(ar_args->tree, *pathspec))
+                       if (**pathspec && !path_exists(ar_args->tree, *pathspec))
                                die("path not found: %s", *pathspec);
                        pathspec++;
                }