fix: Fixes for when the player scene isn't used in a room. (#404)

Co-authored-by: Dennis Ploeger <develop@dieploegers.de>

game/rooms/room13/r_door.tscn

@@ -0,0 +1,25 @@
+[gd_scene load_steps=3 format=2]
+
+[ext_resource path="res://addons/escoria-core/game/core-scripts/esc_item.gd" type="Script" id=1]
+[ext_resource path="res://addons/escoria-core/game/core-scripts/esc_location.gd" type="Script" id=2]
+
+[node name="r_door" type="Area2D"]
+pause_mode = 1
+script = ExtResource( 1 )
+__meta__ = {
+"_editor_description_": ""
+}
+global_id = "r1_r_exit"
+esc_script = "res://game/rooms/room01/esc/right_exit.esc"
+is_exit = true
+tooltip_name = "Exit"
+default_action = "walk"
+dialog_color = Color( 1, 1, 1, 1 )
+animations = null
+
+[node name="CollisionPolygon2D" type="CollisionPolygon2D" parent="."]
+polygon = PoolVector2Array( 1177.94, 348.61, 1175.95, 45.3759, 1276.06, 92.0953, 1277.95, 399.407 )
+
+[node name="Position2D" type="Position2D" parent="."]
+position = Vector2( 1225.47, 353.99 )
+script = ExtResource( 2 )