tree a0d330dc232ce2740d7f16e4c508428424a69510
parent 3ed4586044f2939384bc2fa696db613ffc1b14b8
author David Neto <dneto@google.com> 1575389936 -0500
committer dan sinclair <dsinclair@google.com> 1575389936 -0500

graphics robust access: use signed clamp (#3073)

Access chain indices are always interpreted as signed integers.
So use signed clamp instead of unsigned clamp.  We must also
clamp to the max signed int for the index type.

Fixes #3072