game is in a working state again, now just cleaning up

src/window.cpp

@@ -29,6 +29,7 @@ void Window::update_display(Point* segments[]) {
 	m_board[segments[2]->m_row][segments[2]->m_col] = segments[2];
 	for(int i = 3; i < ROW * COL; i++) {
 		if(segments[i] != nullptr) {
+			if(segments[i]->m_row < 0 || segments[i]->m_col < 0) continue;
 			m_board[segments[i]->m_row][segments[i]->m_col] = segments[i];
 		}
 	}