small_pres is now calculated in Prob_3d using small_temp and small_dens, and the ambient gas composition.
small_pres is now calculated in Prob_3d using small_temp and small_dens, and the ambient gas composition.

BoxLib-Codes/wdmerger,BoxLib-Codes/wdmerger,BoxLib-Codes/wdmerger,BoxLib-Codes/wdmerger