improve error message in config.c
Show errno if opening a lockfile fails. Signed-off-by: NAlex Riesen <raa.lkml@gmail.com> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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Show errno if opening a lockfile fails. Signed-off-by: NAlex Riesen <raa.lkml@gmail.com> Signed-off-by: NJunio C Hamano <gitster@pobox.com>