set_worktree_head_symref(): fix error message

diff --git a/sha1_name.c b/sha1_name.c
index d0f844db897751adca937578185c7421095bbc1e..3acf221f92f7a0857f17c0210044cacc325c8ce0 100644 (file)
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -87,9 +87,8 @@ static void find_short_object_filename(int len, const char *hex_pfx, struct disa
                 * object databases including our own.
                 */
                const char *objdir = get_object_directory();
-               int objdir_len = strlen(objdir);
-               int entlen = objdir_len + 43;
-               fakeent = xmalloc(sizeof(*fakeent) + entlen);
+               size_t objdir_len = strlen(objdir);
+               fakeent = xmalloc(st_add3(sizeof(*fakeent), objdir_len, 43));
                memcpy(fakeent->base, objdir, objdir_len);
                fakeent->name = fakeent->base + objdir_len + 1;
                fakeent->name[-1] = '/';