Memory Leakage #15

Environment:
python:3.6.9
pylsd:ocrd-fork-pylsd == 0.0.3
OS: Linux16.04

from pylsd.lsd import lsd
img = cv2.imread("./a.jpg")
gray = cv2.cvtColor(img, cv2.COLOR_BGRA2GRAY)
lines = lsd(gray)

Memory leaks occur when as above code is used.