Memory leak with some data

[ihor-hrechka]

Looks like memory leak is still in place in case of some data.

Test data:
https://drive.google.com/file/d/145nGKKlH93v8WIg2IEnZ5e0_GFXCynJQ/view?usp=sharing

Code to reproduce:

import os, psutil
import cv2
import numpy as np

from pylsd.lsd import lsd

img = np.load('array.bin.npy')

process = psutil.Process(os.getpid())

if len(img.shape) == 3:
    img = cv2.cvtColor(img, cv2.COLOR_RGB2GRAY)
    
while True:
    lines = lsd(img, quant=0.7)
    print(process.memory_info().rss)