Fix error in AudioStreamPlayer2D

scene/2d/audio_stream_player_2d.cpp

@@ -84,7 +84,7 @@ StringName AudioStreamPlayer2D::_get_actual_bus() {
 	ERR_FAIL_COND_V(world_2d.is_null(), SceneStringName(Master));
 
 	PhysicsDirectSpaceState2D *space_state = PhysicsServer2D::get_singleton()->space_get_direct_state(world_2d->get_space());
-	ERR_FAIL_COND_V(space_state, SceneStringName(Master));
+	ERR_FAIL_NULL_V(space_state, SceneStringName(Master));
 	PhysicsDirectSpaceState2D::ShapeResult sr[MAX_INTERSECT_AREAS];
 
 	PhysicsDirectSpaceState2D::PointParameters point_params;