Validate glyph size before insetting for atlases

Bug: b/501483855
Change-Id: I27f4201a80238ebbbdf74b45403deda5e5c744ee
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/1221677
Reviewed-by: Thomas Smith <thomsmit@google.com>
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
2 files changed