XmlStore - serverside fetchItemByIdentity() always fetches null item

[Caspar]

dojox.data.XmlStore?'s fetchItemByIdentity function has a typo on line 1437 which causes it to always pass a null item to its provided onItem callback when serverside filtering is enabled.

Line 1437 is

var items = self._getItems(items, {});

At this point items is undefined.

Line 1437 should be

var items = self._getItems(data, {});

When this change is made, the function works as expected.

Originally found this bug by setting the value on a FilteringSelect? widget backed by a XmlStore? with sendQuery set to true; the displayed value isn't changed because the item returned by the store's fetchItemByIdentity onItem callback is null.

[Jared Jurkiewicz]

(In [21925]) Very minor fix to XmlStore?. Wrong variable used in serverside query case. fixes #11024