autoadd feature should verify that autoadd location is directory

[craSH]

The autoadd code currently only checks to see if the autoadd location exists, not that it is a directory - if it exists and is a file, it will raise an exception rather than being handled properly.

In 'deluge/core/autoadd.py':

 70         # Check the auto add folder for new torrents to add
 71         if not os.path.exists(self.config["autoadd_location"]):

os.path.exists should simply be os.path.isdir, which will behave the same as .exists but will return false if the argument is not a directory.

[andar]

Agreed. Fixed in [5767]

Thanks!