Slight optimization in spai0 for non-scalar types
Slight optimization in spai0 for non-scalar types

ddemidov/amgcl,dondieselkopf/amgcl,dondieselkopf/amgcl,ddemidov/amgcl,ddemidov/amgcl,ddemidov/amgcl,dondieselkopf/amgcl