msxml3: Silence a warning in ::get_baseName() for document nodes.

dlls/msxml3/node.c

@@ -1632,6 +1632,7 @@ static HRESULT WINAPI xmlnode_get_baseName(
         break;
     case XML_TEXT_NODE:
     case XML_COMMENT_NODE:
+    case XML_DOCUMENT_NODE:
         break;
     default:
         ERR("Unhandled type %d\n", This->node->type );

dlls/msxml3/tests/domdoc.c

@@ -656,6 +656,11 @@ if (0)
     r = IXMLDOMDocument_get_nodeName( doc, NULL );
     ok ( r == E_INVALIDARG, "get_nodeName (NULL) wrong code\n");
 
+    str = (BSTR)0xdeadbeef;
+    r = IXMLDOMDocument_get_baseName( doc, &str );
+    ok ( r == S_FALSE, "got 0x%08x\n", r);
+    ok (str == NULL, "got %p\n", str);
+
     /* content doesn't matter here */
     str = NULL;
     r = IXMLDOMDocument_get_nodeName( doc, &str );