A couple of minor cleanups.
2 patches for repository http://darcs.net/screened:
Wed Sep 8 07:02:45 BST 2010 Ganesh Sittampalam <ganesh@earth.li>
* change hang into error when bad hunk encountered during resolution
Wed Sep 8 07:04:23 BST 2010 Ganesh Sittampalam <ganesh@earth.li>
* fix off-by-one error with Hunk patches in QuickCheck tests
It turns out the offsets are 1-based, not 0-based.