Fix shader include dependency handling

scene/resources/shader.cpp

@@ -42,9 +42,12 @@ Shader::Mode Shader::get_mode() const {
 }
 
 void Shader::_dependency_changed() {
-	RenderingServer::get_singleton()->shader_set_code(shader, RenderingServer::get_singleton()->shader_get_code(shader));
+	// Preprocess and compile the code again because a dependency has changed. It also calls emit_changed() for us.
+	_recompile();
+}
 
-	emit_changed();
+void Shader::_recompile() {
+	set_code(get_code());
 }
 
 void Shader::set_path(const String &p_path, bool p_take_over) {

scene/resources/shader.h

@@ -60,6 +60,7 @@ private:
 	HashMap<StringName, HashMap<int, Ref<Texture2D>>> default_textures;
 
 	void _dependency_changed();
+	void _recompile();
 	virtual void _update_shader() const; //used for visual shader
 	Array _get_shader_uniform_list(bool p_get_groups = false);