Grzegorz Kowal 72ca908bc6 Add forcing terms after the main update.
- change order of calculating terms; first perform the main update
   of the conserved variables, then add forcing and source terms; in
   this way we do not change time step which determines the stability of
   scheme before the conserved variables enter Riemann solver; this is
   especially important in highly supersonic simulations, when in the
   presence of very low density, even small change of velocity can make
   the scheme numerically unstable;
2011-04-26 10:36:16 -03:00
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