duel_set

static void duel_set(const unsigned int did, struct map_session_data* sd) {
	int lOldChangeMap = sd->state.changemap;
	int lOldWarping = sd->state.warping;
	sd->state.changemap = 1;
	sd->state.warping = 1;

	// As you move to a different plane, ground effects need to be cleared
	skill_clear_unitgroup(&sd->bl);
	skill_unit_move(&sd->bl, gettick(), 2);
	skill_cleartimerskill(&sd->bl);

	sd->duel_group = did;

	if(!lOldWarping)
		skill_unit_move(&sd->bl, gettick(), 3);

	sd->state.changemap = lOldChangeMap;
	sd->state.warping = lOldWarping;
}