Merge branch 'ks/history-commit-leakfix'

The memory leak caused by not unusing the commit buffer returned by
repo_logmsg_reencode() during the rewording operation in 'git
history' has been plugged.

* ks/history-commit-leakfix:
  builtin/history: unuse the commit buffer after use

builtin/history.c

@@ -161,6 +161,7 @@ out:
 	free_commit_extra_headers(original_extra_headers);
 	strbuf_release(&commit_message);
 	free(original_author);
+	repo_unuse_commit_buffer(repo, commit_with_message, original_message);
 	return ret;
 }