Free some one time alloc of the UI (cleaner valgrind output)

No incremental leaks here..
* downcase (const char*) uses strdup, caller needs to free
* free allocated cursors when the editor is destroyed
* drop static editor lua-instance & bindings
* delete allocated gtk image/icons

gtk2_ardour/ardour_ui.cc

@@ -746,6 +746,7 @@ ARDOUR_UI::~ARDOUR_UI ()
 		delete luawindow; luawindow = 0;
 		delete editor; editor = 0;
 		delete mixer; mixer = 0;
+		delete rc_option_editor; rc_option_editor = 0; // failed to wrap object warning
 		delete nsm; nsm = 0;
 		delete gui_object_state; gui_object_state = 0;
 		delete main_window_visibility;
@@ -5566,7 +5567,7 @@ ARDOUR_UI::setup_toplevel_window (Gtk::Window& window, const string& name, void*
 	}
 
 	window.set_title (title.get_string());
-	window.set_wmclass (string_compose (X_("%1_%1"), downcase (PROGRAM_NAME), downcase (name)), PROGRAM_NAME);
+	window.set_wmclass (string_compose (X_("%1_%1"), downcase (std::string(PROGRAM_NAME)), downcase (name)), PROGRAM_NAME);
 
 	window.set_flags (CAN_FOCUS);
 	window.add_events (Gdk::KEY_PRESS_MASK|Gdk::KEY_RELEASE_MASK);

gtk2_ardour/editor.cc

@@ -890,10 +890,21 @@ Editor::~Editor()
 	delete _locations;
 	delete _playlist_selector;
 	delete _time_info_box;
+	delete selection;
+	delete cut_buffer;
+	delete _cursors;
+
+	LuaInstance::destroy_instance ();
 
 	for (list<XMLNode *>::iterator i = selection_op_history.begin(); i != selection_op_history.end(); ++i) {
 		delete *i;
 	}
+	for (std::map<ARDOUR::FadeShape, Gtk::Image*>::const_iterator i = _xfade_in_images.begin(); i != _xfade_in_images.end (); ++i) {
+		delete i->second;
+	}
+	for (std::map<ARDOUR::FadeShape, Gtk::Image*>::const_iterator i = _xfade_out_images.begin(); i != _xfade_out_images.end (); ++i) {
+		delete i->second;
+	}
 }
 
 XMLNode*

gtk2_ardour/luainstance.cc

@@ -833,6 +833,13 @@ LuaInstance::instance ()
 	return _instance;
 }
 
+void
+LuaInstance::destroy_instance ()
+{
+	delete _instance;
+	_instance = 0;
+}
+
 LuaInstance::LuaInstance ()
 {
 	lua.Print.connect (&_lua_print);

gtk2_ardour/luainstance.h

@@ -79,6 +79,7 @@ class LuaInstance : public PBD::ScopedConnectionList, public ARDOUR::SessionHand
 {
 public:
 	static LuaInstance* instance();
+	static void destroy_instance();
 	~LuaInstance();
 
 	static void register_classes (lua_State* L);

gtk2_ardour/mouse_cursors.cc

@@ -72,6 +72,11 @@ MouseCursors::MouseCursors ()
 {
 }
 
+MouseCursors::~MouseCursors ()
+{
+	drop_all ();
+}
+
 void
 MouseCursors::drop_all ()
 {

gtk2_ardour/mouse_cursors.h

@@ -29,6 +29,7 @@ class MouseCursors
 {
 public:
 	MouseCursors ();
+	~MouseCursors ();
 
 	void set_cursor_set (const std::string& name);
 	std::string cursor_set() const { return _cursor_set; }

gtk2_ardour/ui_config.cc

@@ -268,7 +268,7 @@ UIConfiguration::color_file_name (bool use_my, bool with_version) const
 
 	basename += color_name;
 	basename += "-";
-	basename += downcase(PROGRAM_NAME);
+	basename += downcase(std::string(PROGRAM_NAME));
 
 	std::string rev (revision);
 	std::size_t pos = rev.find_first_of("-");