Tomahawk t:column groupBy with exception under an empty data table

[Anthony Hong]

I use t:column under t:dataTable,
If there is no row in this datatable, ArrayIndexOutOfBoundsException occured.
If there are some datas in dataTable, it works fine.
Anyone have this proble?
I use Myfaces1.1.3 + Tomahawk1.1.3+Facelete1.11

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Anthony Hong