Revision 120

In procedure fxhyp, removed the possibility to set scal180 to
false. The useful lower bound of fhyp and xxpr is not 0. It does not
make sense to give the save attribute to is2 since fxhyp is only
called one per run. Bug fix: is2 could be used without being
defined. The bug did not appear because is2 had the save attribute so
it was initialized at 0.