[Wien] Small bug with hybrid functionals

[tran at theochem.tuwien.ac.at]

Dear WIEN2k users,

There is a bug in the file calc_cnk.F in $WIENROOT/SRC_hf/
To fix the bug you need to remove the sign "-" as follows:

tauinv(1:3,(nsym+1):nsyminv) = -tau(1:3,1:nsym)

has to be replaced by

tauinv(1:3,(nsym+1):nsyminv) = tau(1:3,1:nsym)

This bug concerns only systems with very particular symmetry and would
probably lead to a crash of the calculation.

F. Tran