fix path op conic bugs

src/pathops/SkOpSpan.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SkOpCoincidence.h"
 #include "SkOpContour.h"
 #include "SkOpSegment.h"
 #include "SkPathWriter.h"
@@ skipping 343 matching lines @@
     SkASSERT(t != 1);
     initBase(segment, prev, t, pt);
     fCoincident = this;
     fToAngle = nullptr;
     fWindSum = fOppSum = SK_MinS32;
     fWindValue = 1;
     fOppValue = 0;
     fTopTTry = 0;
     fChased = fDone = false;
     segment->bumpCount();
+    fAlreadyAdded = false;
 }
 
 void SkOpSpan::setOppSum(int oppSum) {
     SkASSERT(!final());
     if (fOppSum != SK_MinS32 && fOppSum != oppSum) {
         this->globalState()->setWindingFailed();
         return;
     }
     SkASSERT(!DEBUG_LIMIT_WIND_SUM || SkTAbs(oppSum) <= DEBUG_LIMIT_WIND_SUM);
     fOppSum = oppSum;
 }
 
 void SkOpSpan::setWindSum(int windSum) {
     SkASSERT(!final());
     if (fWindSum != SK_MinS32 && fWindSum != windSum) {
         this->globalState()->setWindingFailed();
         return;
     }
     SkASSERT(!DEBUG_LIMIT_WIND_SUM || SkTAbs(windSum) <= DEBUG_LIMIT_WIND_SUM);
     fWindSum = windSum;
 }