Variable mpich is not defined

[efaulhaber]

This variable is only defined here

tmpi/tmpi

Lines 11 to 13 in f5a0fd8

	check_mpirun() {
	mpich=$(${mpirun_cmd} --version |grep -i -e HYDRA -e Intel)
	openmpi=$(${mpirun_cmd} --version |grep -i "Open MPI")

and doesn't exist here

tmpi/tmpi

Lines 108 to 112 in f5a0fd8

	if [ -n "${mpich}" ]; then
	mpi_env="-e MPI -e HYD -e PMI"
	else
	mpi_env="-e MPI -e OPAL -e PMIX"
	fi

or here

tmpi/tmpi

Lines 237 to 241 in f5a0fd8

	if [ -n "${mpich}" ]; then
	mpi_arg="" # used to be -pmi-port
	else
	mpi_arg="--oversubscribe"
	fi

This causes tmpi to fail with MPICH, as --oversubscribe doesn't work.