Fix bad cast to XPath::Filter in XPathGrammar.y

Source/core/xml/XPathGrammar.y

 /*
  * Copyright 2005 Frerich Raabe <raabe@kde.org>
  * Copyright (C) 2006 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 
  * 1. Redistributions of source code must retain the above copyright
@@ skipping 411 matching lines @@
     LocationPath
     {
         $$ = $1;
     }
     |
     FilterExpr
     |
     FilterExpr '/' RelativeLocationPath
     {
         $3->setAbsolute(true);
-        $$ = new Path(static_cast<Filter*>($1), $3);
+        $$ = new Path($1, $3);
         parser->unregisterParseNode($1);
         parser->unregisterParseNode($3);
         parser->registerParseNode($$);
     }
     |
     FilterExpr DescendantOrSelf RelativeLocationPath
     {
         $3->insertFirstStep($2);
         $3->setAbsolute(true);
-        $$ = new Path(static_cast<Filter*>($1), $3);
+        $$ = new Path($1, $3);
         parser->unregisterParseNode($1);
         parser->unregisterParseNode($2);
         parser->unregisterParseNode($3);
         parser->registerParseNode($$);
     }
     ;
 
 FilterExpr:
     PrimaryExpr
     |
@@ skipping 92 matching lines @@
     MINUS UnaryExpr
     {
         $$ = new Negative;
         $$->addSubExpression(adoptPtr($2));
         parser->unregisterParseNode($2);
         parser->registerParseNode($$);
     }
     ;
 
 %%