look for deleted pts when detecting line/curve coincident edges

src/pathops/SkPathOpsDebug.cpp

Index: src/pathops/SkPathOpsDebug.cpp
diff --git a/src/pathops/SkPathOpsDebug.cpp b/src/pathops/SkPathOpsDebug.cpp
index 2903e0898494ef42720c2d46703edee3f2b62845..d28dc7292480e0d83738866d112244d4ea2895ae 100644
--- a/src/pathops/SkPathOpsDebug.cpp
+++ b/src/pathops/SkPathOpsDebug.cpp
@@ -364,7 +364,7 @@ void SkOpAngle::debugValidate() const {
         }
         next = next->fNext;
     } while (next && next != first);
-    SkASSERT(wind == 0);
+    SkASSERT(wind == 0 || !FLAGS_runFail);
     SkASSERT(opp == 0 || !FLAGS_runFail);
 #endif
 }