Fixed npc_enable_sub (#4717)

Fixed an issue introduced in https://github.com/rathena/rathena/commit/67a07fd4d6667901e3275fd07f389df215954390
Fixed #4716 

Thanks to @SOSKaito

src/map/npc.cpp

@@ -220,7 +220,7 @@ int npc_enable_sub(struct block_list *bl, va_list ap)
 	{
 		TBL_PC *sd = (TBL_PC*)bl;
 
-		if (nd->sc.option&OPTION_INVISIBLE)
+		if (nd->sc.option&(OPTION_INVISIBLE|OPTION_CLOAK))
 			return 1;
 
 		switch (nd->subtype) {
@@ -347,8 +347,21 @@ bool npc_enable_target(const char* name, uint32 char_id, int flag)
 		map_foreachinmap(npc_cloaked_sub, nd->bl.m, BL_PC, nd->bl.id);	// Because npc option has been updated we remove the npc id from sd->cloaked_npc
 	}
 
-	if( flag&11 && (nd->u.scr.xs >= 0 || nd->u.scr.ys >= 0) )// check if player standing on a OnTouchArea
-		map_foreachinallarea( npc_enable_sub, nd->bl.m, nd->bl.x-nd->u.scr.xs, nd->bl.y-nd->u.scr.ys, nd->bl.x+nd->u.scr.xs, nd->bl.y+nd->u.scr.ys, BL_PC, nd );
+	if (flag&11) {	// check if player standing on a OnTouchArea
+		int xs = -1, ys = -1;
+		switch (nd->subtype) {
+		case NPCTYPE_SCRIPT:
+			xs = nd->u.scr.xs;
+			ys = nd->u.scr.ys;
+			break;
+		case NPCTYPE_WARP:
+			xs = nd->u.warp.xs;
+			ys = nd->u.warp.ys;
+			break;
+		}
+		if (xs >= 0 || ys >= 0)
+			map_foreachinallarea( npc_enable_sub, nd->bl.m, nd->bl.x-xs, nd->bl.y-ys, nd->bl.x+xs, nd->bl.y+ys, BL_PC, nd );
+	}
 
 	return true;
 }
@@ -1183,7 +1196,7 @@ int npc_touch_areanpc2(struct mob_data *md)
 
 	for( i = 0; i < mapdata->npc_num_area; i++ )
 	{
-		if( mapdata->npc[i]->sc.option&OPTION_INVISIBLE )
+		if( mapdata->npc[i]->sc.option&(OPTION_INVISIBLE|OPTION_CLOAK) )
 			continue;
 
 		switch( mapdata->npc[i]->subtype )