fix fuzzers

src/pathops/SkPathWriter.cpp

Index: src/pathops/SkPathWriter.cpp
diff --git a/src/pathops/SkPathWriter.cpp b/src/pathops/SkPathWriter.cpp
index 1f6dddd137f03a1cfc289880b7a074b88bf41be4..c94809e8ecc183784f8cd0337953df7c76b74b17 100644
--- a/src/pathops/SkPathWriter.cpp
+++ b/src/pathops/SkPathWriter.cpp
@@ -48,23 +48,26 @@ void SkPathWriter::cubicTo(const SkPoint& pt1, const SkPoint& pt2, const SkOpPtT
     fCurrent.cubicTo(pt1, pt2, pt3->fPt);
 }
 
-void SkPathWriter::deferredLine(const SkOpPtT* pt) {
+bool SkPathWriter::deferredLine(const SkOpPtT* pt) {
     SkASSERT(fFirstPtT);
     SkASSERT(fDefer[0]);
     if (fDefer[0] == pt) {
         // FIXME: why we're adding a degenerate line? Caller should have preflighted this.
-        return;
+        return true;
     }
     if (pt->contains(fDefer[0])) {
         // FIXME: why we're adding a degenerate line?
-        return;
+        return true;
+    }
+    if (this->matchedLast(pt)) {
+        return false;
     }
-    SkASSERT(!this->matchedLast(pt));
     if (fDefer[1] && this->changedSlopes(pt)) {
         this->lineTo();
         fDefer[0] = fDefer[1];
     }
     fDefer[1] = pt;
+    return true;
 }
 
 void SkPathWriter::deferredMove(const SkOpPtT* pt) {