fixed distrans.py sample (distanceTransform -> distanceTransformWithLabels)

samples/python2/distrans.py

@@ -26,7 +26,7 @@ if __name__ == '__main__':
         need_update = False
         thrs = cv2.getTrackbarPos('threshold', 'distrans')
         mark = cv2.Canny(img, thrs, 3*thrs)
-        dist, labels = cv2.distanceTransform(~mark, cv.CV_DIST_L2, 5)
+        dist, labels = cv2.distanceTransformWithLabels(~mark, cv.CV_DIST_L2, 5)
         if voronoi:
             vis = cm[np.uint8(labels)]
         else: