Prevent SkMatrixConvolutionImageFilter from allocating large buffers it can't fill

Bug: skia:7937
Change-Id: I71a5673939b3d91864a4b788e1e3a520b0ee04dd
Reviewed-on: https://skia-review.googlesource.com/129179
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Kevin Lubick <kjlubick@google.com>
1 file changed