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xdiff/xprepare: initialise xdlclassifier_t cf in xdl_prepare_env()

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Ensure that the xdl_free_classifier() call on xdlclassifier_t cf is safe
even if xdl_init_classifier() isn't called. This may occur in the case
where diff is run with --histogram and a call to, say, xdl_prepare_ctx()
fails.

Signed-off-by: Tay Ray Chuan <rctay89@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Tay Ray Chuan 2011-08-31 12:48:46 +08:00 committed by Junio C Hamano
parent 6486a84cb8
commit 2738bc3f09
1 changed files with 2 additions and 0 deletions
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xdiff/xprepare.c
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@ -239,6 +239,8 @@ int xdl_prepare_env(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp,
long enl1, enl2, sample; long enl1, enl2, sample;
xdlclassifier_t cf; xdlclassifier_t cf;
memset(&cf, 0, sizeof(cf));
/* /*
* For histogram diff, we can afford a smaller sample size and * For histogram diff, we can afford a smaller sample size and
* thus a poorer estimate of the number of lines, as the hash * thus a poorer estimate of the number of lines, as the hash