Some memory leaks fixed.

include/effect_clock.h

@@ -10,6 +10,7 @@ private:
     Window* window = new Window(0, LED_HEIGHT - 6, LED_WIDTH, 6);
 
 public:
+    ~ClockEffect();
     void loop();
     void loop(boolean invert, CRGB fg_color, CRGB bg_color);
 };

include/effect_snake.h

@@ -17,6 +17,7 @@ private:
 	bool is_direction_okay(uint8_t direction);
 public:
 	SnakeEffect();
+	~SnakeEffect();
 	void loop();
 	boolean valid_position(Coords c);
 	Coords update_position(Coords c, uint8_t direction);

src/effect_clock.cpp

@@ -40,3 +40,7 @@ void ClockEffect::loop(boolean invert, CRGB fg_color, CRGB bg_color) {
 		window->setPixel(7, 4, &fg_color);
 	}
 }
+
+ClockEffect::~ClockEffect() {
+	delete window;
+}

src/effect_gol.cpp

@@ -26,6 +26,7 @@ void GolEffect::_initialize() {
 GolEffect::~GolEffect() {
 	delete[] _data;
 	delete[] _old;
+	delete window;
 }
 
 void GolEffect::loop() {

src/effect_pixelclock.cpp

@@ -10,6 +10,7 @@ PixelClockEffect::PixelClockEffect() {
 PixelClockEffect::~PixelClockEffect() {
 	delete _color_seconds;
 	delete _color_minutes;
+	delete window;
 }
 
 void PixelClockEffect::loop() {

src/effect_snake.cpp

@@ -6,6 +6,10 @@ SnakeEffect::SnakeEffect() {
 	this->window = new Window(0, 0, LED_WIDTH, LED_HEIGHT-6);
 }
 
+SnakeEffect::~SnakeEffect() {
+	delete window;
+}
+
 void SnakeEffect::loop() {
 	if (run++ % EFFECT_SNAKE_SLOWDOWN == 0) { // Change the coordinates only on every n-th run.
 		if (random8(EFFECT_SNAKE_DIRECTION_CHANGE)==0 || is_turn_needed()) turn_random();