break ambiguous angle sorting loop

src/pathops/SkOpSegment.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef SkOpSegment_DEFINE
 #define SkOpSegment_DEFINE
 
 #include "SkOpAngle.h"
@@ skipping 353 matching lines @@
         if (*sumWinding == SK_MinS32) {
           return;
         }
         *sumWinding -= deltaSum;
     }
 
     void setUpWindings(SkOpSpanBase* start, SkOpSpanBase* end, int* sumMiWinding,
                        int* maxWinding, int* sumWinding);
     void setUpWindings(SkOpSpanBase* start, SkOpSpanBase* end, int* sumMiWinding, int* sumSuWinding,
                        int* maxWinding, int* sumWinding, int* oppMaxWinding, int* oppSumWinding);
-    void sortAngles();
+    bool sortAngles();
     bool spansNearby(const SkOpSpanBase* ref, const SkOpSpanBase* check) const;
 
     static int SpanSign(const SkOpSpanBase* start, const SkOpSpanBase* end) {
         int result = start->t() < end->t() ? -start->upCast()->windValue()
                 : end->upCast()->windValue();
         return result;
     }
 
     SkOpAngle* spanToAngle(SkOpSpanBase* start, SkOpSpanBase* end) {
         SkASSERT(start != end);
@@ skipping 64 matching lines @@
     mutable SkScalar fDebugBaseMin;  // if > 0, the 1st t value in this seg vis-a-vis the ref seg
     mutable SkScalar fDebugBaseMax;
     mutable int fDebugLastIndex;
     mutable SkScalar fDebugLastMin;  // if > 0, the last t -- next t val - base has same sign
     mutable SkScalar fDebugLastMax;
 #endif
     SkDEBUGCODE(int fID);
 };
 
 #endif