area_size and mapflag

[Tomahawk]

Is it possible to change area_size based on mapflag? I'm trying to change clif.cpp with no luck

 

		if(mapdata->flag[MF_NEWAREA]) {
		map_foreachinallarea(clif_send_sub, bl->m, bl->x-20, bl->y-20, bl->x+20, bl->y+20,
		BL_PC, buf, len, bl, type);}
		else {
		map_foreachinallarea(clif_send_sub, bl->m, bl->x-AREA_SIZE, bl->y-AREA_SIZE, bl->x+AREA_SIZE, bl->y+AREA_SIZE,
		BL_PC, buf, len, bl, type);}
		break;

Map server crashes on start. Thank you for reading.