fix pathops fuzzers

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 376 matching lines @@
             if (inner->deleted()) {
                 continue;
             }
             SkOpSpanBase* innerBase = inner->span();
             SkASSERT(innerBase->ptT() == inner);
             // when the intersection is first detected, the span base is marked if there are 
             // more than one point in the intersection.
             if (!zero_or_one(inner->fT)) {
                 innerBase->upCast()->release(test);
             } else {
-                SkASSERT(inner->fT != test->fT);
+                SkOPASSERT(inner->fT != test->fT);
                 if (!zero_or_one(test->fT)) {
                     testBase->upCast()->release(inner);
                 } else {
                     segment->markAllDone();  // mark segment as collapsed
                     SkDEBUGCODE(testBase->debugSetDeleted());
                     test->setDeleted();
                     SkDEBUGCODE(innerBase->debugSetDeleted());
                     inner->setDeleted();
                 }
             }
@@ skipping 76 matching lines @@
         }
     }
 #if DEBUG_COINCIDENCE
     SkASSERT(0); // FIXME? if we get here, the span is missing its opposite segment...
 #endif
     return true;
 }
 
 void SkOpSpan::release(const SkOpPtT* kept) {
     SkDEBUGCODE(fDebugDeleted = true);
-    SkASSERT(kept->span() != this);
+    SkOPASSERT(kept->span() != this);
     SkASSERT(!final());
     SkOpSpan* prev = this->prev();
     SkASSERT(prev);
     SkOpSpanBase* next = this->next();
     SkASSERT(next);
     prev->setNext(next);
     next->setPrev(prev);
     this->segment()->release(this);
     SkOpCoincidence* coincidence = this->globalState()->coincidence();
     if (coincidence) {
@@ skipping 22 matching lines @@
 
 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;
 }