mshtml: Don't assume that nsIDOMHTMLElement inherits from nsIDOMNode in HTMLDocument_createStyleSheet.
This will change after the next Gecko update.
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@ -1625,10 +1625,14 @@ static HRESULT WINAPI HTMLDocument_createStyleSheet(IHTMLDocument2 *iface, BSTR
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nsres = nsIDOMHTMLDocument_GetHead(This->doc_node->nsdoc, &head_elem);
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if(NS_SUCCEEDED(nsres)) {
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nsIDOMNode *tmp_node;
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nsIDOMNode *head_node, *tmp_node;
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nsres = nsIDOMHTMLHeadElement_AppendChild(head_elem, (nsIDOMNode*)elem->nselem, &tmp_node);
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nsres = nsIDOMHTMLHeadElement_QueryInterface(head_elem, &IID_nsIDOMNode, (void**)&head_node);
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nsIDOMHTMLHeadElement_Release(head_elem);
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assert(nsres == NS_OK);
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nsres = nsIDOMNode_AppendChild(head_node, elem->node.nsnode, &tmp_node);
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nsIDOMNode_Release(head_node);
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if(NS_SUCCEEDED(nsres) && tmp_node)
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nsIDOMNode_Release(tmp_node);
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}
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