* erived from s_smpi_subtype which required the functions unserialize and serialize */
s_smpi_mpi_contiguous_t* smpi_datatype_contiguous_create( MPI_Aint lb, int block_count, MPI_Datatype old_type,
int size_oldtype){
+ if(block_count==0)return NULL;
s_smpi_mpi_contiguous_t *new_t= xbt_new(s_smpi_mpi_contiguous_t,1);
new_t->base.serialize = &serialize_contiguous;
new_t->base.unserialize = &unserialize_contiguous;