add asserts to point<-->verb helpers

src/pathops/SkReduceOrder.cpp

Index: src/pathops/SkReduceOrder.cpp
diff --git a/src/pathops/SkReduceOrder.cpp b/src/pathops/SkReduceOrder.cpp
index 5410d35ec98129ba69464188692e26be1fc62e34..6d2339c276f9c518b3f4a19b9db00e7911e58dba 100644
--- a/src/pathops/SkReduceOrder.cpp
+++ b/src/pathops/SkReduceOrder.cpp
@@ -437,7 +437,7 @@ SkPath::Verb SkReduceOrder::Quad(const SkPoint a[3], SkTDArray<SkPoint>* reduceP
             pt->fY = SkDoubleToScalar(reducer.fLine[index].fY);
         }
     }
-    return (SkPath::Verb) (order - 1);
+    return SkPathOpsPointsToVerb(order - 1);
 }
 
 SkPath::Verb SkReduceOrder::Cubic(const SkPoint a[4], SkTDArray<SkPoint>* reducePts) {
@@ -452,5 +452,5 @@ SkPath::Verb SkReduceOrder::Cubic(const SkPoint a[4], SkTDArray<SkPoint>* reduce
             pt->fY = SkDoubleToScalar(reducer.fQuad[index].fY);
         }
     }
-    return (SkPath::Verb) (order - 1);
+    return SkPathOpsPointsToVerb(order - 1);
 }