cat-file: refactor error handling of batch_objects
cat-file: refactor error handling of batch_objects

This just pulls the return value for the function out of the
inner loop, so we can break out of the loop rather than do
an early return. This will make it easier to put any cleanup
for the function in one place.

Signed-off-by: Jeff King <696e3fbcf235d40b6ea1ebd61c87cbea79d444e7@peff.net>
Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git