Fix some compilation errors

Author: scgm0

scene/2d/mesh_instance_2d.h

@@ -31,6 +31,7 @@
 #pragma once
 
 #include "scene/2d/node_2d.h"
+#include "scene/resources/mesh.h"
 
 class NavigationPolygon;
 class NavigationMeshSourceGeometryData2D;

scene/2d/tile_map_layer.cpp

@@ -37,6 +37,7 @@
 #include "scene/2d/tile_map.h"
 #include "scene/gui/control.h"
 #include "scene/resources/2d/navigation_mesh_source_geometry_data_2d.h"
+#include "scene/resources/material.h"
 #include "scene/resources/world_2d.h"
 
 #ifndef PHYSICS_2D_DISABLED

scene/animation/animation_blend_space_2d.cpp

@@ -32,6 +32,7 @@
 
 #include "animation_blend_tree.h"
 #include "core/math/geometry_2d.h"
+#include "scene/resources/material.h"
 
 void AnimationNodeBlendSpace2D::get_parameter_list(List<PropertyInfo> *r_list) const {
 	AnimationNode::get_parameter_list(r_list);

scene/resources/2d/tile_set.cpp

@@ -37,6 +37,7 @@
 #include "core/templates/rb_set.h"
 #include "scene/gui/control.h"
 #include "scene/resources/image_texture.h"
+#include "scene/resources/mesh.h"
 
 #ifndef NAVIGATION_2D_DISABLED
 #include "servers/navigation_2d/navigation_server_2d.h"