reduce delta head inflated size

Supposing that both the base and result sizes were both full size 64-bit
values, their encoding would occupy only 9.2 bytes each.  Therefore
inflating 64 bytes is way overkill.  Limit it to 20 bytes instead which
should be plenty enough for a couple years to come.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/sha1_file.c b/sha1_file.c
index 716aef33e3a28039a8659d77d6797dc183730643..47e2a29abd6d2ae067d72c0f73bcf4e6afe0a938 100644 (file)
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -908,7 +908,7 @@ static int packed_delta_info(struct packed_git *p,
 
        if (sizep) {
                const unsigned char *data;
-               unsigned char delta_head[64];
+               unsigned char delta_head[20];
                unsigned long result_size;
                z_stream stream;
                int st;