starting cleanup and mini optimizations or making names better

include/elements.hpp

@@ -32,6 +32,7 @@ struct Point {
 
 struct Ball {
 	Ball(int default_vx, int default_vy) : vx(default_vx), vy(default_vy) {};
+	~Ball();
 	Point* m_origin;
 	int vx;
 	int vy;

src/elements.cpp

@@ -104,6 +104,11 @@ void Paddle::check_collision(Ball &ball) {
 	}
 }
 
+Ball::~Ball() {
+	delete m_origin;
+	m_origin = nullptr;
+}
+
 void Ball::change_velocity(char d) {
 	if(d == 'x') {
 		if(vx == -1) vx = 1;