Fix traceback when nothing was added during unbundle The changegroup and commit hook are now run only when something is modified. The correct number of changesets added is printed.

#!/bin/sh

hg init
mkfifo p

hg serve --stdio < p &
P=$!
(echo lock; echo addchangegroup; sleep 5) > p &
Q=$!
sleep 1
kill -HUP $P
sleep 1
ls .hg