changed #ifdef CTU for #ifndef VL in PPMC to account for SIMPLE integrator
changed #ifdef CTU for #ifndef VL in PPMC to account for SIMPLE integrator

cholla-hydro/cholla,evaneschneider/cholla,evaneschneider/cholla,cholla-hydro/cholla,evaneschneider/cholla,cholla-hydro/cholla,cholla-hydro/cholla,evaneschneider/cholla