fix a few more fuzzes

src/pathops/SkOpSpan.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 SkOpSpan_DEFINED
 #define SkOpSpan_DEFINED
 
 #include "SkPathOpsDebug.h"
@@ skipping 500 matching lines @@
     void setNext(SkOpSpanBase* nextT) {
         SkASSERT(!final());
         fNext = nextT;
     }
 
     void setOppSum(int oppSum);
 
     void setOppValue(int oppValue) {
         SkASSERT(!final());
         SkASSERT(fOppSum == SK_MinS32);
-        SkASSERT(!oppValue || !fDone);
+        SkOPASSERT(!oppValue || !fDone);
         fOppValue = oppValue;
     }
 
     void setToAngle(SkOpAngle* angle) {
         SkASSERT(!final());
         fToAngle = angle;
     }
 
     void setWindSum(int windSum);
 
@@ skipping 29 matching lines @@
     int fWindSum;  // accumulated from contours surrounding this one.
     int fOppSum;  // for binary operators: the opposite winding sum
     int fWindValue;  // 0 == canceled; 1 == normal; >1 == coincident
     int fOppValue;  // normally 0 -- when binary coincident edges combine, opp value goes here
     int fTopTTry; // specifies direction and t value to try next
     bool fDone;  // if set, this span to next higher T has been processed
     mutable bool fAlreadyAdded;
 };
 
 #endif