failed to download sometimes in QQ music playlist download

[William Z.]

When downloading 神のまにまに in a playlist :

--------------------------------------------------
13 神のまにまに  4042699字节
Traceback (most recent call last):
  File "MusicDownloader.py", line 291, in <module>
    if Music() == 0:
  File "MusicDownloader.py", line 152, in Music
    audiofile.tag.images.set(3, audio_Image.content, "image/jpeg")
  File "eyed3\utils\__init__.py", line 143, in wrapped_fn
  File "eyed3\id3\tag.py", line 1593, in set
ValueError: img_url MUST not be none when no image data
[17956] Failed to execute script 'MusicDownloader' due to unhandled exception!
  已内嵌名称  已内嵌歌手
[已退出进程，代码为 1 (0x00000001)]

---

Downloading 花降らし :

28 花降らし  4719789字节
Traceback (most recent call last):
  File "MusicDownloader.py", line 291, in <module>
    if Music() == 0:
  File "MusicDownloader.py", line 152, in Music
    audiofile.tag.images.set(3, audio_Image.content, "image/jpeg")
  File "eyed3\utils\__init__.py", line 143, in wrapped_fn
  File "eyed3\id3\tag.py", line 1593, in set
ValueError: img_url MUST not be none when no image data
[5604] Failed to execute script 'MusicDownloader' due to unhandled exception!
  已内嵌名称  已内嵌歌手
[已退出进程，代码为 1 (0x00000001)]

It is worth noting that, the problem doesn't happen to any specific songs or playlists.
Also it connot download QQ music vip songs at the moment

[Beadd]

When downloading 神のまにまに in a playlist :

--------------------------------------------------
13 神のまにまに  4042699字节
Traceback (most recent call last):
  File "MusicDownloader.py", line 291, in <module>
    if Music() == 0:
  File "MusicDownloader.py", line 152, in Music
    audiofile.tag.images.set(3, audio_Image.content, "image/jpeg")
  File "eyed3\utils\__init__.py", line 143, in wrapped_fn
  File "eyed3\id3\tag.py", line 1593, in set
ValueError: img_url MUST not be none when no image data
[17956] Failed to execute script 'MusicDownloader' due to unhandled exception!
  已内嵌名称  已内嵌歌手
[已退出进程，代码为 1 (0x00000001)]

Downloading 花降らし :

28 花降らし  4719789字节
Traceback (most recent call last):
  File "MusicDownloader.py", line 291, in <module>
    if Music() == 0:
  File "MusicDownloader.py", line 152, in Music
    audiofile.tag.images.set(3, audio_Image.content, "image/jpeg")
  File "eyed3\utils\__init__.py", line 143, in wrapped_fn
  File "eyed3\id3\tag.py", line 1593, in set
ValueError: img_url MUST not be none when no image data
[5604] Failed to execute script 'MusicDownloader' due to unhandled exception!
  已内嵌名称  已内嵌歌手
[已退出进程，代码为 1 (0x00000001)]

It is worth noting that, the problem doesn't happen to any specific songs or playlists. Also it connot download QQ music vip songs at the moment

第一首可以下载，第二首歌的封面出错了，已经修复

[Beadd]

见v1.8.4