Build 4.0.0.93 of xlsgen fixes a problem related to use cases with iterative writing in cells.

Unlike most scenarios where values/formulas in cells are written only once, sometimes cells are used as counters or indicators hence the values may be written more than once. Cells can in fact be written many times over and over again. And xlsgen had a problem with that in its internal data structure. It would arise by writing more than 128 times a value in a given cell.

This build fixes the problem.