Fix MSVS x64 build EGLAttrib can be a 64-bit type on some configurations, in which case it needs an explicit cast to be converted to EGLint. TEST=standalone MSVS 2015 x64 debug build Change-Id: I6b3e0ae705e8862e079e81e516d6bf99409732e7 Reviewed-on: https://chromium-review.googlesource.com/350411 Reviewed-by: Olli Etuaho <oetuaho@nvidia.com> Commit-Queue: Olli Etuaho <oetuaho@nvidia.com> Reviewed-by: Yuly Novikov <ynovikov@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Geoff Lang <geofflang@chromium.org>