Fixing clusterfuzz issue

When reading an SkSSE2ProcCoeffXfermode object, fProcSIMD should never be NULL. The reason for this is that it's not possible to create such an object through SkPlatformXfermodeFactory_impl_SSE2(), which is the only function used to create these objects, so if we're reading one, it's clearly invalid.

BUG=379181
R=reed@google.com, mtklein@google.com

Author: sugoi@chromium.org

Review URL: https://codereview.chromium.org/306183002

git-svn-id: http://skia.googlecode.com/svn/trunk/src@15000 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed