/*D
   MPI_File_get_type_extent - Returns the extent of datatype in the file

Synopsis:
.vb
int MPI_File_get_type_extent(MPI_File fh, MPI_Datatype datatype,
                             MPI_Aint *extent)
.ve
.vb
int MPI_File_get_type_extent_c(MPI_File fh, MPI_Datatype datatype,
                               MPI_Count *extent)
.ve

Input Parameters:
+ fh - file handle (handle)
- datatype - datatype (handle)

Output Parameters:
. extent - datatype extent (integer)

.N ThreadSafe

.N Fortran

.N Errors
.N MPI_SUCCESS
.N MPI_ERR_ARG
.N MPI_ERR_TYPE
.N MPI_ERR_OTHER

D*/

