Bug 576802 - Fix crash with gradientTransform animate. r=jwatt

content/svg/content/src/nsSVGElement.cpp

@@ -1953,6 +1953,8 @@ nsSVGElement::GetAnimatedAttr(nsIAtom* aName)
   if (aName == nsGkAtoms::gradientTransform) {
     nsCOMPtr<nsIDOMSVGGradientElement> gradientElement(
             do_QueryInterface(static_cast<nsIContent*>(this)));
+    if (!gradientElement)
+      return nsnull;
 
     nsresult rv = gradientElement->GetGradientTransform(getter_AddRefs(transformList));
     NS_ENSURE_SUCCESS(rv, nsnull);
@@ -1960,6 +1962,8 @@ nsSVGElement::GetAnimatedAttr(nsIAtom* aName)
   if (aName == nsGkAtoms::patternTransform) {
     nsCOMPtr<nsIDOMSVGPatternElement> patternElement(
             do_QueryInterface(static_cast<nsIContent*>(this)));
+    if (!patternElement)
+      return nsnull;
 
     nsresult rv = patternElement->GetPatternTransform(getter_AddRefs(transformList));
     NS_ENSURE_SUCCESS(rv, nsnull);