Fix structQualifierErrorCheck calls in glslang.y structQualifierErrorCheck is called incorrectly in glslang.y. Remove one unnecessary call entirely and change another call to samplerErrorCheck. This will enable further changes to merge structQualifierErrorCheck into singleDeclarationErrorCheck. TEST=angle_unittests BUG=angleproject:969 Change-Id: Ib43233e275fbf4db7e5fda6df6b45a655bdee8a2 Reviewed-on: https://chromium-review.googlesource.com/265200 Reviewed-by: Jamie Madill <jmadill@chromium.org> Tested-by: Olli Etuaho <oetuaho@nvidia.com> Reviewed-by: Geoff Lang <geofflang@chromium.org>