Merge branch 'sh/write-pack-file-warning-message-fix'

A warning from "git pack-objects" were generated by referring to an
incorrect variable when forming the filename that we had trouble
with.

* sh/write-pack-file-warning-message-fix:
  write_pack_file: use correct variable in diagnostic

builtin/pack-objects.c

@@ -823,7 +823,7 @@ static void write_pack_file(void)
 				utb.modtime = --last_mtime;
 				if (utime(pack_tmp_name, &utb) < 0)
 					warning("failed utime() on %s: %s",
-						tmpname, strerror(errno));
+						pack_tmp_name, strerror(errno));
 			}
 
 			/* Enough space for "-<sha-1>.pack"? */