[DFTB-Plus-User] Bug fix of dispersion correction for periodic systems in release 1.2

[Christoph Lechner]

Hi!
First of all thank you for the quick reply!

We did not use lattice optimization during the calculations.
Over the weekend I recalculated one of the potential energy curves and 
could reproduce the results obtained with version 1.1.
The differences I first saw were only due to some of the optimizations 
being rather sensitive to the input geometry.
It seems after all it was much ado about nothing.

Thanks again for your help.

Best regards,
Christoph Lechner