Update TextureEffect to avoid extraneous out variable.

Using return statements generates better code when there are no early
exits.

Change-Id: I18edd49991324aaf1473b614261862d273eac541
Bug: skia:10549
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/321237
Auto-Submit: John Stiles <johnstiles@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
2 files changed