bug killed: solver must not clear linearsolver (lis) if it wasn't initialised; for example when the residual is always zero from the begining
bug killed: solver must not clear linearsolver (lis) if it wasn't initialised; for example when the residual is always zero from the begining

PaddySchmidt/gofem,cpmech/gofem,cpmech/gofem,PaddySchmidt/gofem,cpmech/gofem,PaddySchmidt/gofem