Fixed several leaks in VisualServerScene, RasterizerSceneGLES3 and RasterizerGLES3

drivers/gles3/rasterizer_gles3.cpp

@@ -415,4 +415,5 @@ RasterizerGLES3::~RasterizerGLES3() {
 
 	memdelete(storage);
 	memdelete(canvas);
+	memdelete(scene);
 }

drivers/gles3/rasterizer_scene_gles3.cpp

@@ -5118,3 +5118,23 @@ void RasterizerSceneGLES3::finalize() {
 
 RasterizerSceneGLES3::RasterizerSceneGLES3() {
 }
+
+RasterizerSceneGLES3::~RasterizerSceneGLES3() {
+
+	memdelete(default_material.get_data());
+	memdelete(default_material_twosided.get_data());
+	memdelete(default_shader.get_data());
+	memdelete(default_shader_twosided.get_data());
+
+	memdelete(default_worldcoord_material.get_data());
+	memdelete(default_worldcoord_material_twosided.get_data());
+	memdelete(default_worldcoord_shader.get_data());
+	memdelete(default_worldcoord_shader_twosided.get_data());
+
+	memdelete(default_overdraw_material.get_data());
+	memdelete(default_overdraw_shader.get_data());
+
+	memfree(state.spot_array_tmp);
+	memfree(state.omni_array_tmp);
+	memfree(state.reflection_array_tmp);
+}

drivers/gles3/rasterizer_scene_gles3.h

@@ -852,6 +852,7 @@ public:
 	void initialize();
 	void finalize();
 	RasterizerSceneGLES3();
+	~RasterizerSceneGLES3();
 };
 
 #endif // RASTERIZERSCENEGLES3_H

servers/visual/visual_server_raster.cpp

@@ -205,4 +205,5 @@ VisualServerRaster::~VisualServerRaster() {
 	memdelete(VSG::canvas);
 	memdelete(VSG::viewport);
 	memdelete(VSG::rasterizer);
+	memdelete(VSG::scene);
 }

servers/visual/visual_server_scene.cpp

@@ -3333,6 +3333,7 @@ VisualServerScene::~VisualServerScene() {
 
 #ifndef NO_THREADS
 	probe_bake_thread_exit = true;
+	probe_bake_sem->post();
 	Thread::wait_to_finish(probe_bake_thread);
 	memdelete(probe_bake_thread);
 	memdelete(probe_bake_sem);