Added communicator-wise condition checking function.
Added communicator-wise condition checking function.

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