MPI_Type_size_c should not return MPI_UNDEFINED

Signed-off-by: Joseph Schuchart <[email protected]>

Author: devreal

ompi/mpi/c/type_size.c.in

@@ -51,7 +51,11 @@ PROTOTYPE ERROR_CLASS type_size(DATATYPE type, COUNT_OUT size)
 
     opal_datatype_type_size ( &type->super, &type_size);
 
-    *size = (type_size > (size_t) INT_MAX) ? MPI_UNDEFINED : (int) type_size;
+    if (sizeof(*size) == sizeof(int) && type_size > (size_t) INT_MAX) {
+        *size = MPI_UNDEFINED;
+    } else {
+        *size = (MPI_Count) type_size;
+    }
 
     return MPI_SUCCESS;
 }