look for deleted pts when detecting line/curve coincident edges

src/pathops/SkPathOpsDebug.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkPathOpsDebug.h"
 #include "SkPath.h"
 #include "SkString.h"
@@ skipping 346 matching lines @@
         }
         useXor = op ? isXor : oppXor;
         SkASSERT(lastOppXor == -1 || lastOppXor == (int) useXor);
         lastOppXor = (int) useXor;
         opp += next->debugSign() * (op ? minSpan->windValue() : minSpan->oppValue());
         if (useXor) {
             opp &= 1;
         }
         next = next->fNext;
     } while (next && next != first);
-    SkASSERT(wind == 0);
+    SkASSERT(wind == 0 || !FLAGS_runFail);
     SkASSERT(opp == 0 || !FLAGS_runFail);
 #endif
 }
 
 void SkOpAngle::debugValidateNext() const {
 #if !FORCE_RELEASE
     const SkOpAngle* first = this;
     const SkOpAngle* next = first;
     SkTDArray<const SkOpAngle*>(angles);
     do {
@@ skipping 275 matching lines @@
 #endif
     SkPath::FillType fillType = path.getFillType();
     SkASSERT(fillType >= SkPath::kWinding_FillType && fillType <= SkPath::kInverseEvenOdd_FillType);
     if (includeDeclaration) {
         SkDebugf("    SkPath %s;\n", name);
     }
     SkDebugf("    %s.setFillType(SkPath::%s);\n", name, gFillTypeStr[fillType]);
     iter.setPath(path);
     showPathContours(iter, name);
 }