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2016-10-12cocci: refactor common patterns to use xstrdup_or_null()Libravatar Junio C Hamano1-0/+7
d64ea0f83b ("git-compat-util: add xstrdup_or_null helper", 2015-01-12) added a handy wrapper that allows us to get a duplicate of a string or NULL if the original is NULL, but a handful of codepath predate its introduction or just weren't aware of it. Signed-off-by: Junio C Hamano <gitster@pobox.com>