fix path ops fuzz buster

src/pathops/SkOpContour.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef SkOpContour_DEFINED
 #define SkOpContour_DEFINED
 
 #include "SkOpSegment.h"
@@ skipping 174 matching lines @@
     void dumpPtsX() const;
     void dumpSegment(int ) const;
     void dumpSegments(SkPathOp op) const;
     void dumpSpan(int ) const;
     void dumpSpans() const;
 
     const SkPoint& end() const {
         return fTail->pts()[SkPathOpsVerbToPoints(fTail->verb())];
     }
 
+    bool findCollapsed() {
+        SkASSERT(fCount > 0);
+        SkOpSegment* segment = &fHead;
+        do {
+            segment->findCollapsed();
+        } while ((segment = segment->next()));
+        return true;
+    }
+
     SkOpSpan* findSortableTop(SkOpContour* );
 
     SkOpSegment* first() {
         SkASSERT(fCount > 0);
         return &fHead;
     }
 
     const SkOpSegment* first() const {
         SkASSERT(fCount > 0);
         return &fHead;
@@ skipping 208 matching lines @@
     bool fXor;  // set if original path had even-odd fill
     bool fOppXor;  // set if opposite path had even-odd fill
     SkDEBUGCODE(int fID);
     SkDEBUGCODE(mutable int fDebugIndent);
 };
 
 class SkOpContourHead : public SkOpContour {
 };
 
 #endif