vakata/jstree — Issue #107: _get_parent() returns both false *and* -1
Author: taybin
Created: 2011-10-18 18:34:28+00:00
State: open

It should probably just return false since false !== -1

```Javascript
_get_parent	: function (obj) {
obj = this._get_node(obj);
if(obj == -1 || !obj.length) { return false; }
var o = obj.parentsUntil(".jstree", "li:eq(0)");
return o.length ? o : -1;
```