Array-stride calculation did not check for zero-sized objects before
performing a modulo. This would lead to undefined behavior (crash)
while attempting to build the AST.
Change-Id: I84b4662978955d49a3ca28f6bb577d15c87cccb6
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/284354
Auto-Submit: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
