didTouchChart will not return last index

**issue**
callback function didTouchChart will not return last index even last data point is touched.

**how to reproduce:**
in StockChart/ SwiftChart Examples, touched data will pop up.
try to touch last point. only "106.98" will pop up but last data is "108.00"

Last data is 108.00. (in data file "APPL.json" has followings.)
...
{ "date": "2014-10-30", "close": 106.98 },
{ "date": "2014-10-31", "close": 108.00 }]
} // end of data

**comment:**
after small investigation, I found method "handleTouchEvents" always select left side index.
i.e. "findClosestInValues" will return left-side index and right-side index for the value, but "handleTouchEvents" will always choose left-side index. (so last index will never be returned.)
is this expected behavior?