/*D
   MPI_Op_free - Frees a user-defined combination function handle

Synopsis:
.vb
int MPI_Op_free(MPI_Op *op)
.ve

Input/Output Parameters:
. op - operation (handle)

.N ThreadSafe

.N Fortran

.N Errors
.N MPI_SUCCESS
.N MPI_ERR_OP
.N MPI_ERR_OTHER

D*/

