Addresses the review comment:
https://swiftshader-review.googlesource.com/c/SwiftShader/+/39885/3/src/Pipeline/SpirvShader.cpp#422

Bug: b/145351270
Change-Id: I9a5ceefe048e63e0f52b7e9a15bd84f6bac16629
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/39955Tested-by: Ben Clayton <bclayton@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>