SkSplicer: fix a typo in srcover stage.

Change-Id: Iafd23c860395587c77cd412a3b522ba851b4570d
Reviewed-on: https://skia-review.googlesource.com/7107
Commit-Queue: Mike Klein <mtklein@chromium.org>
Reviewed-by: Mike Klein <mtklein@chromium.org>
Reviewed-by: Herb Derby <herb@google.com>
2 files changed