Fixed incompatibility with recent ViennaCL
Fixed incompatibility with recent ViennaCL

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