Fixed bug in calculation of eigenvalues when Beta not equal to one.

A pretty stupid mistake that effects all eigenvalue calculations, but only when Beta ~= 1. It was easily fixed and all functions that used shc_lv_eigs() and such should handle this properly now. The bug was fund while incorporating coupling between SHC cycles.

Signed-off-by: Andrew D. Horchler <adh9@case.edu>