Bug 664138 - Fix various build bustages following landing of |Bug 659053 - Remove nsIDOM3Node| - winlivemail fix r=neil

mailnews/import/winlivemail/nsWMSettings.cpp

@@ -72,7 +72,6 @@
 #include "nsIFileStreams.h"
 #include "nsIDOMParser.h"
 #include "nsIDOMElement.h"
-#include "nsIDOM3Node.h"
 #include "nsTArray.h"
 #include <windows.h>
 #include "nsIWindowsRegKey.h"
@@ -241,8 +240,7 @@ nsresult WMSettings::GetValueForTag(nsIDOMDocument *xmlDoc,
   list->Item(0, getter_AddRefs(domNode));
   if (!domNode)
     return NS_ERROR_FAILURE;
-  nsCOMPtr<nsIDOM3Node> domChildNode(do_QueryInterface(domNode));
-  return domChildNode->GetTextContent(value);
+  return domNode->GetTextContent(value);
 }
 
 nsresult WMSettings::MakeXMLdoc(nsIDOMDocument** xmlDoc,