fix drawDRRect for fuzzer

make assert abort instead

Bug: skia:6450
Change-Id: I23ff51124fa8f069f2c7e5260f800017d7475d46
Reviewed-on: https://skia-review.googlesource.com/13197
Commit-Queue: Cary Clark <caryclark@google.com>
Reviewed-by: Hal Canary <halcanary@google.com>
2 files changed