Clang 9 escalates a warning about an unsigned integer being compared against a signed integer into an error. Fixed by making an integer literal be unsigned. Bug: b/152777669 Change-Id: I38c61ac0837f756c73b8664f7774719a94353fac Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/51530Tested-by: Sean Risser <srisser@google.com> Commit-Queue: Sean Risser <srisser@google.com> Reviewed-by: Nicolas Capens <nicolascapens@google.com>
