Fix size calculation of blockless for-loops.

Change-Id: Id6e1d1be276af01ce05777682dde8b58d803aedc
Bug: oss-fuzz:37837
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/449097
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
2 files changed