Fix inset for ambient tessellated shadows

Ambient shadows were showing a little space between
the path and the shadow -- this covers that up.


Change-Id: Ib7076748dc6c77a3643ce6d925c79fb8a468e502
Reviewed-on: https://skia-review.googlesource.com/17130
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
1 file changed