i965: Use safer pointer arithmetic in gather_oa_results()

This patch reduces the likelihood of pointer arithmetic overflow bugs in
gather_oa_results(), like the one fixed by b69c7c5dac.

I haven't yet encountered any overflow bugs in the wild along this
patch's codepath. But I get nervous when I see code patterns like this:

   (void*) + (int) * (int)

I smell 32-bit overflow all over this code.

This patch retypes 'snapshot_size' to 'ptrdiff_t', which should fix any
potential overflow.

Reviewed-by: Kenneth Graunke <[email protected]>
Signed-off-by: Chad Versace <[email protected]>

0 files changed, 0 insertions, 0 deletions