Exit with return code 255 rather than -1 in the event of error. Also exit with an error if an exception is caught while generating the diffs.
Exit with return code 255 rather than -1 in the event of error. Also exit with
an error if an exception is caught while generating the diffs.


git-svn-id: a68a83646e9f3f8749d8366215f39ba5d386d793@283 a0402a4a-d63b-ad04-3ffe-6d551d543dc1

makkus/getdown,makkus/getdown