fix bugs found by computing flat clips in 800K skps

src/pathops/SkIntersectionHelper.h

Index: src/pathops/SkIntersectionHelper.h
diff --git a/src/pathops/SkIntersectionHelper.h b/src/pathops/SkIntersectionHelper.h
index 4e8c658ec23d49dd7da3a917fc3f2cb38275f26e..3569c934de14a29d17224d2330d8bdfb8ce3676f 100644
--- a/src/pathops/SkIntersectionHelper.h
+++ b/src/pathops/SkIntersectionHelper.h
@@ -54,6 +54,11 @@ public:
         return ++fIndex < fLast;
     }
 
+    void alignTPt(SkIntersectionHelper& other, bool swap, int index,
+            SkIntersections* ts, SkPoint* point) {
+        fContour->alignTPt(fIndex, other.fContour, other.fIndex, swap, index, ts, point);
+    }
+
     SkScalar bottom() const {
         return bounds().fBottom;
     }