object-file: get rid of `the_repository` in `loose_object_info()`
While `loose_object_info()` already accepts a repository as parameter we
still have one callsite in there where we use `the_repository` to figure
out the hash algorithm. Use the passed-in repository instead.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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