The printf specifiers expect an int, passing a smaller width integer could lead to weirdness being printed.

Change-Id: I1e75e3fdade270a4bfa55c48efe82ca9f331b2fe
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/31272
Presubmit-Ready: Ben Clayton <bclayton@google.com>
Tested-by: Ben Clayton <bclayton@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Chris Forbes <chrisforbes@google.com>