fix for unpack of roll usage message

src/common/slurmdbd_defs.c

@@ -2146,6 +2146,7 @@ slurmdbd_unpack_roll_usage_msg(dbd_roll_usage_msg_t **msg, Buf buffer)
 	dbd_roll_usage_msg_t *msg_ptr = xmalloc(sizeof(dbd_roll_usage_msg_t));
 
 	safe_unpack_time(&msg_ptr->start, buffer);
+	return SLURM_SUCCESS;
 	
 unpack_error:
 	slurmdbd_free_roll_usage_msg(msg_ptr);