upload-pack: make check_non_tip() clean things up on error
On error check_non_tip() will die and not closing file descriptors is no big deal. The next patch will split the majority of this function out for reuse in other cases, where die() may not be the only outcome. Same story for popping SIGPIPE out of the signal chain. So let's make sure we clean things up properly first. Signed-off-by: NNguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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