fix variable sample matrices in FP files

Change-Id: I7bcfdd821d004529231a6d082528538c796858d0
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/291956
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
1 file changed