memory leak fix

src/slurmctld/proc_req.c

@@ -1682,7 +1682,7 @@ static void _slurm_rpc_job_step_create(slurm_msg_t * msg)
 #ifdef HAVE_FRONT_END
 		if (step_rec->job_ptr->batch_host) {
 			job_step_resp.step_layout->front_end =
-				xstrdup(step_rec->job_ptr->batch_host);
+				step_rec->job_ptr->batch_host;
 		}
 #endif
 		job_step_resp.cred           = slurm_cred;