Fix segfault in diff-delta.c when FLEX_ARRAY is 1

aka don't do pointer arithmetics on structs that have a FLEX_ARRAY member,
or you'll end up believing your array is 1 cell off its real address.

Signed-off-by: Pierre Habouzit <madcoder@debian.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/diff-delta.c b/diff-delta.c
index 9e440a9299b902bc96749ad2c86c08df6492eb1c..601b49e37f0852abdb8309dbae1ac91ea07f003a 100644 (file)
--- a/diff-delta.c
+++ b/diff-delta.c
@@ -264,7 +264,7 @@ struct delta_index * create_delta_index(const void *buf, unsigned long bufsize)
        index->src_size = bufsize;
        index->hash_mask = hmask;
 
-       mem = index + 1;
+       mem = index->hash;
        packed_hash = mem;
        mem = packed_hash + (hsize+1);
        packed_entry = mem;