LOL. SOLVED.
Code:
else if(!isNickChangeAccepted(val) && isNickChangeAccepted(name))
{
//client_print_color(id, -1, "New: %s || Old: %s", val, name);
engfunc(EngFunc_SetClientKeyValue, id, buffer, "name", name);
NnChRspwner(id, 1);
engfunc(EngFunc_SetClientKeyValue, id, buffer, "name", val);
return FMRES_SUPERCEDE;
}