Bug-fix for "mg" with Chebychev smoothers (petsc options -mymg_nosmd -1, -mymg_nosmu -1). Fixes mantis #769.
Bug-fix for "mg" with Chebychev smoothers (petsc options -mymg_nosmd -1, -mymg_nosmu -1). Fixes mantis #769.

jrper/fluidity,rjferrier/fluidity,jrper/fluidity,iakovos-panourgias/fluidity,iakovos-panourgias/fluidity,jjo31/ATHAM-Fluidity,iakovos-panourgias/fluidity,rjferrier/fluidity,rjferrier/fluidity,jjo31/ATHAM-Fluidity,jrper/fluidity,rjferrier/fluidity,rjferrier/fluidity,jjo31/ATHAM-Fluidity,iakovos-panourgias/fluidity,jjo31/ATHAM-Fluidity,jjo31/ATHAM-Fluidity,iakovos-panourgias/fluidity,jrper/fluidity,jrper/fluidity