Fix for https://github.com/jquery/jquery-tmpl/issues#issue/64.

Should be able to pass 0 or false as values for data to .tmpl( data ),
and have the template render against that as a valid data value.
OTOH passing no data at all, or null, is treated as rendering the template
once with no data.

jquery.tmpl.js

@@ -16,7 +16,7 @@
 		// The content field is a hierarchical array of strings and nested items (to be
 		// removed and replaced by nodes field of dom elements, once inserted in DOM).
 		var newItem = {
-			data: data || (parentItem ? parentItem.data : {}),
+			data: data || (data === 0 || data === false) ? data : (parentItem ? parentItem.data : {}),
 			_wrap: parentItem ? parentItem._wrap : null,
 			tmpl: null,
 			parent: parentItem || null,