[Bug] Issue while passing playx playlist

[NISH1001]

When a local playlist with extension .playx is passed, there's always this message:

[PlaylistBase]: Passed pl-start argument is not valid!
[PlaylistBase]: Passed pl-end argument is not valid!
[PlaylistBase]: Passed pl-start argument is not valid!
[PlaylistBase]: Passed pl-end argument is not valid!

@deepjyoti30 there might be an inherent bug in the function _is_valid(). The default values should have been taken.

[deepjyoti30]

@NISH1001 Sorry, i made a mistake. We need to change line 72 and 76 in playlistbase from else to elif not self.is_valid_start and elif not self.is_valid_end.
This should fix the issue.

[NISH1001]

@deepjyoti30 That didn't work...