HSSF sheets with even row numbers are read incorrectly by MS Project.

Cause: Wrong lastrow entry in DimensionsRecord as written by
method org.apache.poi.hssf.model.Sheet.addRow(RowRecord):

 if (row.getRowNumber() > d.getLastRow())
 {
    d.setLastRow(row.getRowNumber() + 1);
 }

Because of the ">" comparism, the lastrow entry will only be
set on every second call to the method. Bugfix: Use ">=" for
the comparism.