Output argument of screen_db does not take file name as a value

[DrrDom]

When run
screen_db -d 1.dat -o output.txt -q model.xyz
it returns an error

Traceback (most recent call last):
  File "/home/pavel/anaconda3/envs/rdkit-2103/bin/screen_db", line 33, in <module>
    sys.exit(load_entry_point('psearch', 'console_scripts', 'screen_db')())
  File "/home/pavel/python/psearch/psearch/screen_db.py", line 205, in entry_point
    screen_db(db_fname=args.dbname,
  File "/home/pavel/python/psearch/psearch/screen_db.py", line 157, in screen_db
    os.makedirs(os.path.dirname(output), exist_ok=True)
  File "/home/pavel/anaconda3/envs/rdkit-2103/lib/python3.9/os.py", line 225, in makedirs
    mkdir(name, mode)
FileNotFoundError: [Errno 2] No such file or directory: ''

While the command
screen_db -d 1.dat -o output -q model.xyz
works fine and creates a dir output with proper files inside

This affects the current lib branch version.