fix destructor order to fix build

src/pathops/SkOpContour.h

Index: src/pathops/SkOpContour.h
diff --git a/src/pathops/SkOpContour.h b/src/pathops/SkOpContour.h
index be1f59f4bbe2a5fa73f51730c01b646285fe3eea..495b643fffe7904c967f312279258436d060ff10 100644
--- a/src/pathops/SkOpContour.h
+++ b/src/pathops/SkOpContour.h
@@ -20,6 +20,12 @@ public:
         reset();
     }
 
+    ~SkOpContour() {
+        if (fNext) {
+            fNext->~SkOpContour();
+        }
+    }
+
     bool operator<(const SkOpContour& rh) const {
         return fBounds.fTop == rh.fBounds.fTop
                 ? fBounds.fLeft < rh.fBounds.fLeft
@@ -61,7 +67,7 @@ public:
 
     SkOpContour* appendContour(SkChunkAlloc* allocator) {
         SkOpContour* contour = SkOpTAllocator<SkOpContour>::New(allocator);
-        
+        contour->setNext(NULL);
         SkOpContour* prev = this;
         SkOpContour* next;
         while ((next = prev->next())) {
@@ -273,7 +279,7 @@ public:
     }
 
     void setNext(SkOpContour* contour) {
-        SkASSERT(!fNext == !!contour);
+//        SkASSERT(!fNext == !!contour);
         fNext = contour;
     }