a misused of w,h in cv2.imread

[JH-Lam]

Hi, against, I found there is a misused w.r.t. image w,h in mtcnn/train/gen_landmark.py#gen_landmark_data():
`
cv2.cvtColor(img, cv2.COLOR_RGB2BGR) # Do this for compatible with caffe model

img_w = img.shape[0]

img_h = img.shape[1]
`
ie. w and h should be swapped above, right?