[SMPI] Remove specific encoding of MPI_DATATYPE_NULL

This code is now being treated by MPI_DATATYPE_NULL
being an object.

diff --git a/src/smpi/mpi/smpi_datatype.cpp b/src/smpi/mpi/smpi_datatype.cpp
index 954dbc9..3c04c85 100644 (file)
--- a/src/smpi/mpi/smpi_datatype.cpp
+++ b/src/smpi/mpi/smpi_datatype.cpp
@@ -206,9 +206,6 @@ bool Datatype::is_basic()
 
 const char* Datatype::encode(MPI_Datatype dt)
 {
-  if (dt == MPI_DATATYPE_NULL)
-    return "-1";
-
   return dt->id.c_str();
 }