Merge branch 'jt/fix-fattening-promisor-fetch' into seen

Fix performance regression of a recent "fatten promisor pack with
local objects" protection against an unwanted gc.

* jt/fix-fattening-promisor-fetch:
  index-pack: work around false positive use of uninitialized variable

Author: gitster

builtin/index-pack.c

@@ -1811,7 +1811,7 @@ static void repack_local_links(void)
 	struct strbuf line = STRBUF_INIT;
 	struct oidset_iter iter;
 	struct object_id *oid;
-	char *base_name;
+	char *base_name = NULL;
 
 	if (!oidset_size(&outgoing_links))
 		return;