prepush: fix bug in warning message selection
In certain situations you would be told "you should pull and merge" even when
there is nothing to pull.
#!/bin/sh
"$TESTDIR/hghave" inotify || exit 80
hg init
touch a
mkdir dir
touch dir/b
touch dir/c
echo "[extensions]" >> $HGRCPATH
echo "inotify=" >> $HGRCPATH
hg add dir/c
echo % inserve
hg inserve -d --pid-file=hg.pid 2>&1
cat hg.pid >> "$DAEMON_PIDS"
hg st
echo % moving dir out
mv dir ../tmp-test-inotify-issue1542
echo % status
hg st
sleep 1
echo "Are we able to kill the service? if not, the service died on some error"
kill `cat hg.pid`