fix a bunch of memory leaks

gtk2_ardour/ardour_button.cc

@@ -926,7 +926,9 @@ ArdourButton::setup_led_rect ()
 		return;
 	}
 
-	_led_rect = new cairo_rectangle_t;
+	if (!_led_rect) {
+		_led_rect = new cairo_rectangle_t;
+	}
 
 	if (_elements & Text) {
 		if (_led_left) {

gtk2_ardour/ardour_ui2.cc

@@ -396,7 +396,7 @@ ARDOUR_UI::setup_transport ()
 	}
 	clock_box->set_spacing (3);
 
-	shuttle_box = new ShuttleControl;
+	shuttle_box = manage (new ShuttleControl);
 	shuttle_box->show ();
 	
 	VBox* transport_vbox = manage (new VBox);

gtk2_ardour/ardour_ui_ed.cc

@@ -632,6 +632,7 @@ ARDOUR_UI::save_ardour_state ()
 			Config->add_instant_xml (location_ui->ui().get_state ());
 		}
 	}
+	delete &enode;
 
 	Keyboard::save_keybindings ();
 }

gtk2_ardour/audio_clock.cc

@@ -260,12 +260,14 @@ AudioClock::set_colors ()
 	r = lrint ((r/255.0) * 65535.0);
 	g = lrint ((g/255.0) * 65535.0);
 	b = lrint ((b/255.0) * 65535.0);
+	delete foreground_attr;
 	foreground_attr = new Pango::AttrColor (Pango::Attribute::create_attr_foreground (r, g, b));
 
 	UINT_TO_RGBA (editing_color, &r, &g, &b, &a);
 	r = lrint ((r/255.0) * 65535.0);
 	g = lrint ((g/255.0) * 65535.0);
 	b = lrint ((b/255.0) * 65535.0);
+	delete editing_attr;
 	editing_attr = new Pango::AttrColor (Pango::Attribute::create_attr_foreground (r, g, b));
 
 	normal_attributes.change (*foreground_attr);

gtk2_ardour/automation_line.cc

@@ -81,10 +81,8 @@ AutomationLine::AutomationLine (const string& name, TimeAxisView& tv, ArdourCanv
 	, _maximum_time (max_framepos)
 {
 	if (converter) {
-		_time_converter = converter;
 		_our_time_converter = false;
 	} else {
-		_time_converter = new Evoral::IdentityConverter<double, framepos_t>;
 		_our_time_converter = true;
 	}
 	

gtk2_ardour/editor.cc

@@ -786,6 +786,7 @@ Editor::~Editor()
 	delete _route_groups;
 	delete _track_canvas_viewport;
 	delete _drags;
+	delete nudge_clock;
 }
 
 XMLNode*

gtk2_ardour/level_meter.cc

@@ -66,6 +66,9 @@ LevelMeterBase::on_theme_changed()
 
 LevelMeterBase::~LevelMeterBase ()
 {
+	_configuration_connection.disconnect();
+	_meter_type_connection.disconnect();
+	_parameter_connection.disconnect();
 	for (vector<MeterInfo>::iterator i = meters.begin(); i != meters.end(); i++) {
 		delete (*i).meter;
 	}

libs/ardour/session.cc

@@ -480,6 +480,7 @@ Session::destroy ()
 	/* clear state tree so that no references to objects are held any more */
 
 	delete state_tree;
+	state_tree = 0;
 
 	/* reset dynamic state version back to default */