Fixed looters getting stuck (#6958)

- Fixes #6939
- Looters will now use complex pathing to find a way to an item they can see
- Monsters no longer stop when using NPC_EMOTION or NPC_EMOTION_ON
- Added a security check to prevent endless loops when easy pathing is used (no longer used by default)

Special thanks to @secretdataz.

src/map/unit.cpp

@@ -531,6 +531,7 @@ static TIMER_FUNC(unit_walktoxy_timer)
 				map[bl->m].users > 0 &&
 				mobskill_use(md, tick, -1)) {
 				if (!(ud->skill_id == NPC_SELFDESTRUCTION && ud->skilltimer != INVALID_TIMER)
+					&& ud->skill_id != NPC_EMOTION && ud->skill_id != NPC_EMOTION_ON //NPC_EMOTION doesn't make the monster stop
 					&& md->state.skillstate != MSS_WALK) //Walk skills are supposed to be used while walking
 				{ // Skill used, abort walking
 					clif_fixpos(bl); // Fix position as walk has been cancelled.
@@ -855,6 +856,9 @@ int unit_walktobl(struct block_list *bl, struct block_list *tbl, int range, unsi
 		//Should walk on the same cell as target (for looters)
 		ud->to_x = tbl->x;
 		ud->to_y = tbl->y;
+		//Because of the change of target position the easy walkpath could fail
+		//Note: Easy walking is no longer used by default, but we keep this to prevent endless loops [Playtester]
+		flag &= ~1;
 	}
 
 	ud->state.walk_easy = flag&1;