mq: avoid qnew committing everything on invalid paths (issue 803)
If paths are supplied but resolve to nothing, localrepo.commit() is called with an empty set and commits the whole dirstate. Avoid this by passing the match function to commit.
#!/bin/sh
"$TESTDIR/hghave" symlink || exit 80
hg init a
ln -s a link
cd a
echo foo > foo
hg status
hg status ../link