submodule: used correct index in is_staging_gitmodules_ok

diff --git a/setup.c b/setup.c
index 03f51e056cd6e672ecd80ba94348173b9d496cc0..94768512b7913c4e46b90fc8226c183cbd7239d7 100644 (file)
--- a/setup.c
+++ b/setup.c
@@ -312,7 +312,9 @@ int is_git_directory(const char *suspect)
        size_t len;
 
        /* Check worktree-related signatures */
-       strbuf_addf(&path, "%s/HEAD", suspect);
+       strbuf_addstr(&path, suspect);
+       strbuf_complete(&path, '/');
+       strbuf_addstr(&path, "HEAD");
        if (validate_headref(path.buf))
                goto done;