setup_git_env: avoid blind fall-back to ".git"

diff --git a/diff.h b/diff.h
index f2b04b6d81319e895023311720d9673a0849e645..01afc70bd572448ed25cdc869b071994e948c546 100644 (file)
--- a/diff.h
+++ b/diff.h
@@ -344,7 +344,7 @@ extern void diff_warn_rename_limit(const char *varname, int needed, int degraded
  * This is different from find_unique_abbrev() in that
  * it stuffs the result with dots for alignment.
  */
-extern const char *diff_aligned_abbrev(const unsigned char *sha1, int);
+extern const char *diff_aligned_abbrev(const struct object_id *sha1, int);
 
 /* do not report anything on removed paths */
 #define DIFF_SILENT_ON_REMOVED 01