ccpr: Fix an overzealous assert in DDL

Bug: skia:
Change-Id: I307e826704ad28d8ef4810b321258d4ac57929a1
Reviewed-on: https://skia-review.googlesource.com/c/164718
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
2 files changed