fix some fuzz

src/pathops/SkOpCoincidence.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 SkOpCoincidence_DEFINED
 #define SkOpCoincidence_DEFINED
 
 #include "SkTDArray.h"
@@ skipping 209 matching lines @@
     }
 
     const SkOpGlobalState* globalState() const {
         return fGlobalState;
     }
 
     bool isEmpty() const {
         return !fHead && !fTop;
     }
 
-    void mark(DEBUG_COIN_DECLARE_ONLY_PARAMS());
+    bool mark(DEBUG_COIN_DECLARE_ONLY_PARAMS());
     void markCollapsed(SkOpPtT* );
 
     static bool Ordered(const SkOpPtT* coinPtTStart, const SkOpPtT* oppPtTStart) {
       return Ordered(coinPtTStart->segment(), oppPtTStart->segment());
     }
 
     static bool Ordered(const SkOpSegment* coin, const SkOpSegment* opp);
     void release(const SkOpSegment* );
     void releaseDeleted();
 
@@ skipping 53 matching lines @@
     SkCoincidentSpans* fTop;
     SkOpGlobalState* fGlobalState;
     bool fContinue;
     bool fSpanDeleted;
     bool fPtAllocated;
     bool fCoinExtended;
     bool fSpanMerged;
 };
 
 #endif