suzerain: use buf for (rho_u, rho_E)

git-svn-id: https://svn.ices.utexas.edu/repos/pecos/suzerain/trunk@43981 0bd85f0b-c151-43b9-a1e9-27231104551f
suzerain: scale (rho_v,rho_E) into buf

git-svn-id: https://svn.ices.utexas.edu/repos/pecos/suzerain/trunk@43982 0bd85f0b-c151-43b9-a1e9-27231104551f
suzerain: scale buf for (rho_w, rho_E)

git-svn-id: https://svn.ices.utexas.edu/repos/pecos/suzerain/trunk@43983 0bd85f0b-c151-43b9-a1e9-27231104551f