Fix SVG animations which set rx or ry attributes

Source/core/rendering/svg/SVGPathData.cpp

Index: Source/core/rendering/svg/SVGPathData.cpp
diff --git a/Source/core/rendering/svg/SVGPathData.cpp b/Source/core/rendering/svg/SVGPathData.cpp
index af95a60187bfccb6e2762c9867bd92b32c78694e..0879b8b831ece367f6f7cfeb2fe3fe680a0d25bb 100644
--- a/Source/core/rendering/svg/SVGPathData.cpp
+++ b/Source/core/rendering/svg/SVGPathData.cpp
@@ -124,8 +124,8 @@ static void updatePathFromRectElement(SVGElement* element, Path& path)
         return;
     float x = rect->x().value(lengthContext);
     float y = rect->y().value(lengthContext);
-    bool hasRx = rect->hasAttribute(SVGNames::rxAttr);
-    bool hasRy = rect->hasAttribute(SVGNames::ryAttr);
+    bool hasRx = rect->rx().value(lengthContext) > 0;
+    bool hasRy = rect->ry().value(lengthContext) > 0;
     if (hasRx || hasRy) {
         float rx = rect->rx().value(lengthContext);
         float ry = rect->ry().value(lengthContext);