Reodering hypotheses doesn't work in the dialog for correlation matrix creation.

[kornl]

Reodering hypotheses doesn't work in the dialog for correlation matrix creation.

 java.lang.ArrayIndexOutOfBoundsException: Array index out of range: 0
    at java.util.Vector.get(Vector.java:744)
    at org.af.gMCP.gui.datatable.RDataFrameRef.getColName(RDataFrameRef.java:22)
    at org.af.gMCP.gui.datatable.DataTableModel.getColumnName(DataTableModel.java:27)
    at javax.swing.JTable.addColumn(JTable.java:2801)
    at javax.swing.JTable.createDefaultColumnsFromModel(JTable.java:1289)
    at javax.swing.JTable.tableChanged(JTable.java:4386)