Positioning in chinese glyphs

+small fix for placeholder in getGlyphPositionAtCoordinate

Bug: skia:12322
Change-Id: I8f03c5c808db54fc9742e5817768db4a088bc5b5
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/440458
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Julia Lavrova <jlavrova@google.com>
2 files changed