mshtml: Use the dispex's query_interface for DOMTextNodes.

dlls/mshtml/htmltextnode.c

@@ -331,9 +331,14 @@ static HRESULT HTMLDOMTextNode_clone(HTMLDOMNode *iface, nsIDOMNode *nsnode, HTM
     return HTMLDOMTextNode_Create(This->node.doc, nsnode, ret);
 }
 
-static void *HTMLDOMTextNode_QI(HTMLDOMNode *iface, REFIID riid)
+static inline HTMLDOMTextNode *impl_from_DispatchEx(DispatchEx *iface)
 {
-    HTMLDOMTextNode *This = impl_from_HTMLDOMNode(iface);
+    return CONTAINING_RECORD(iface, HTMLDOMTextNode, node.event_target.dispex);
+}
+
+static void *HTMLDOMTextNode_query_interface(DispatchEx *dispex, REFIID riid)
+{
+    HTMLDOMTextNode *This = impl_from_DispatchEx(dispex);
 
     if(IsEqualGUID(&IID_IHTMLDOMTextNode, riid))
         return &This->IHTMLDOMTextNode_iface;
@@ -346,13 +351,12 @@ static void *HTMLDOMTextNode_QI(HTMLDOMNode *iface, REFIID riid)
 static const cpc_entry_t HTMLDOMTextNode_cpc[] = {{NULL}};
 
 static const NodeImplVtbl HTMLDOMTextNodeImplVtbl = {
-    .qi                    = HTMLDOMTextNode_QI,
     .cpc_entries           = HTMLDOMTextNode_cpc,
     .clone                 = HTMLDOMTextNode_clone
 };
 
 static const dispex_static_data_vtbl_t HTMLDOMTextNode_dispex_vtbl = {
-    .query_interface = HTMLDOMNode_query_interface,
+    .query_interface = HTMLDOMTextNode_query_interface,
     .destructor      = HTMLDOMNode_destructor,
     .traverse        = HTMLDOMNode_traverse,
     .unlink          = HTMLDOMNode_unlink