verify-cvs2svn.py: Fix signature of split_output().

Suggested by: Henning Moll

git-svn-id: http://cvs2svn.tigris.org/svn/cvs2svn/trunk@5420 be7e6eca-30d4-0310-a8e5-ac0d63af7087
Make sure to close CVS repository files after parsing them.

Aside from being the right thing to do, this prevents exhaustion of
file descriptors on Python implementations that are not based on
reference counting.

This should fix issue #149.

git-svn-id: http://cvs2svn.tigris.org/svn/cvs2svn/trunk@5421 be7e6eca-30d4-0310-a8e5-ac0d63af7087