Map-server crashing. I need a little help

[Grimfiend]

I've made this change in the script.c:

BUILDIN_FUNC(plagiarize)
{
	int skillid, lv;
	struct map_session_data * sd = script_rid2sd(st);
	struct script_data *data;
	
	data = script_getdata(st, 2);
	skillid = ( data_isstring(data) ? skill_name2id(script_getstr(st,2)) : script_getnum(st,2) );
	lv=script_getnum(st,3);
	
	if (sd->cloneskill_idx && sd->status.skill[sd->cloneskill_idx].flag == 13){
				sd->status.skill[sd->cloneskill_idx].id = 0;
				sd->status.skill[sd->cloneskill_idx].lv = 0;
				sd->status.skill[sd->cloneskill_idx].flag = 0;
			}
	if (pc_checkskill(sd,RG_PLAGIARISM)) {		
			sd->cloneskill_idx = skillid;
			sd->status.skill[sd->cloneskill_idx].id = skillid;
			sd->status.skill[sd->cloneskill_idx].lv = lv;
			sd->status.skill[sd->cloneskill_idx].flag = 13;//cloneskill flag
			pc_setglobalreg(sd, add_str(SKILL_VAR_PLAGIARISM), skillid);
			pc_setglobalreg(sd, add_str(SKILL_VAR_PLAGIARISM_LV), lv);
			clif_skillinfoblock(sd);
			}
	return 0;
}

This mod will enable me to add skill in the Plagiarism slot via npc, but when I use this (using the npc) the map-server crash. :/

 

Sorry I don't have too much knowledge in C to understand 100% of this mod.

Edited July 6, 2017 by Grimfiend