include the right RDF idl file

mailnews/base/public/nsIDOMMsgAppCore.idl

@@ -42,7 +42,7 @@
 #include "nsIDOMNodeList.idl"
 #include "nsIDOMXULTreeElement.idl"
 #include "nsIDOMXULElement.idl"
-#include "nsIRDFCompositeDataSource.idl"
+#include "nsRDFInterfaces.idl"
 
 [object, uuid(4f7966d0-c14f-11d2-b7f2-00805f05ffa5)]
 interface nsIDOMMsgAppCore : nsIDOMBaseAppCore {