This fixes the build when using gcc.
Change-Id: I98b9afcf0b40b692e46f92dc4b71583e41877281
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/34681
Auto-Submit: dan sinclair <dsinclair@chromium.org>
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>