Correct agent purge logic for a newer message type

src/slurmctld/agent.c

@@ -1380,8 +1380,9 @@ static void _purge_agent_args(agent_arg_t *agent_arg_ptr)
 				RESPONSE_RESOURCE_ALLOCATION)
 			slurm_free_resource_allocation_response_msg(
 					agent_arg_ptr->msg_args);
-		else if ((agent_arg_ptr->msg_type == REQUEST_ABORT_JOB)     ||
-			 (agent_arg_ptr->msg_type == REQUEST_TERMINATE_JOB) ||
+		else if ((agent_arg_ptr->msg_type == REQUEST_ABORT_JOB)      ||
+			 (agent_arg_ptr->msg_type == REQUEST_TERMINATE_JOB)  ||
+			 (agent_arg_ptr->msg_type == REQUEST_KILL_PREEMPTED) ||
 			 (agent_arg_ptr->msg_type == REQUEST_KILL_TIMELIMIT))
 			slurm_free_kill_job_msg(agent_arg_ptr->msg_args);
 		else if (agent_arg_ptr->msg_type == SRUN_USER_MSG)