fix arcto exception handling

src/core/SkPath.cpp

Index: src/core/SkPath.cpp
diff --git a/src/core/SkPath.cpp b/src/core/SkPath.cpp
index 40ca50b5caf99b4c93f6f9380a9ea62a9f2b7793..75a4cdcd7a25d7fc7eaf6c857eddb5668612ea2f 100644
--- a/src/core/SkPath.cpp
+++ b/src/core/SkPath.cpp
@@ -1271,12 +1271,14 @@ void SkPath::arcTo(SkScalar rx, SkScalar ry, SkScalar angle, SkPath::ArcSize arc
     // joining the endpoints.
     // http://www.w3.org/TR/SVG/implnote.html#ArcOutOfRangeParameters
     if (!rx || !ry) {
+        this->lineTo(x, y);
         return;
     }
     // If the current point and target point for the arc are identical, it should be treated as a
     // zero length path. This ensures continuity in animations.
     srcPts[1].set(x, y);
     if (srcPts[0] == srcPts[1]) {
+        this->lineTo(x, y);
         return;
     }
     rx = SkScalarAbs(rx);