Merge branch 'jk/prune-mtime' into maint

The helper used to iterate over loose object directories to prune
stale objects did not closedir() immediately when it is done with a
directory--a callback such as the one used for "git prune" may want
to do rmdir(), but it would fail on open directory on platforms
such as WinXP.

* jk/prune-mtime:
  prune: close directory earlier during loose-object directory traversal

sha1_file.c

@@ -3507,12 +3507,12 @@ static int for_each_file_in_obj_subdir(int subdir_nr,
 				break;
 		}
 	}
-	strbuf_setlen(path, baselen);
+	closedir(dir);
 
+	strbuf_setlen(path, baselen);
 	if (!r && subdir_cb)
 		r = subdir_cb(subdir_nr, path->buf, data);
 
-	closedir(dir);
 	return r;
 }