Clean up static_cast<SVGFooElement*> by using toSVGFoo()

Source/core/css/CSSCursorImageValue.cpp

Index: Source/core/css/CSSCursorImageValue.cpp
diff --git a/Source/core/css/CSSCursorImageValue.cpp b/Source/core/css/CSSCursorImageValue.cpp
index 878fd8910dedff545c93d605d82dc874d3412ab2..33515a3100a0e899696f2bfa849badb05ea37d19 100644
--- a/Source/core/css/CSSCursorImageValue.cpp
+++ b/Source/core/css/CSSCursorImageValue.cpp
@@ -42,7 +42,7 @@ static inline SVGCursorElement* resourceReferencedByCursorElement(const String&
 {
     Element* element = SVGURIReference::targetElementFromIRIString(url, document);
     if (element && element->hasTagName(SVGNames::cursorTag))
-        return static_cast<SVGCursorElement*>(element);
+        return toSVGCursorElement(element);
 
     return 0;
 }