msxml3: Return E_INVALIDARG when value is NULL.

dlls/msxml3/node.c

@@ -219,6 +219,9 @@ static HRESULT WINAPI xmlnode_get_nodeValue(
 
     TRACE("%p %p\n", This, value);
 
+    if(!value)
+        return E_INVALIDARG;
+
     V_BSTR(value) = NULL;
     V_VT(value) = VT_NULL;
 

dlls/msxml3/tests/domdoc.c

@@ -545,6 +545,10 @@ static void test_domnode( void )
 
     VariantInit(&var);
     ok( V_VT(&var) == VT_EMPTY, "variant init failed\n");
+
+    r = IXMLDOMNode_get_nodeValue( doc, NULL );
+    ok(r == E_INVALIDARG, "get_nodeValue ret %08x\n", r );
+
     r = IXMLDOMNode_get_nodeValue( doc, &var );
     ok( r == S_FALSE, "nextNode returned wrong code\n");
     ok( V_VT(&var) == VT_NULL, "variant wasn't empty\n");