fix pathops fuzzer

turn assert into fail

R=kjlubick

Change-Id: I3a2172b6b1a9eff092bcfddcf8310f32754b93f7
Reviewed-on: https://skia-review.googlesource.com/132780
Commit-Queue: Cary Clark <caryclark@skia.org>
Commit-Queue: Kevin Lubick <kjlubick@google.com>
Auto-Submit: Cary Clark <caryclark@skia.org>
Reviewed-by: Kevin Lubick <kjlubick@google.com>
diff --git a/src/pathops/SkOpCoincidence.cpp b/src/pathops/SkOpCoincidence.cpp
index ab848c8..93d0e40 100644
--- a/src/pathops/SkOpCoincidence.cpp
+++ b/src/pathops/SkOpCoincidence.cpp
@@ -789,7 +789,7 @@
         const SkOpPtT* ocs = outer->coinPtTStart();
         FAIL_IF(ocs->deleted());
         const SkOpSegment* outerCoin = ocs->segment();
-        SkASSERT(!outerCoin->done());  // if it's done, should have already been removed from list
+        FAIL_IF(outerCoin->done());
         const SkOpPtT* oos = outer->oppPtTStart();
         if (oos->deleted()) {
             return true;