jutge upload fails when a problem is not found

[Leixb]

Behaviour

Issuing the command:

jutge upload --problem-set 'Consolidation 3' --delay 10000

Gives this error:

Problem set exceds contains more than 20 problems (70) continue? [Ny]
y
Traceback (most recent call last):
  File "./jutge_cli/jutge.py", line 170, in <module>
    if __name__ == '__main__': main()
  File "./jutge_cli/jutge.py", line 168, in main
    args.func(args)
  File "./jutge_cli/jutge.py", line 28, in run_upload
    def run_upload(args): upload.upload(args)
  File "/home/leix/Documents/Projects/jutge_cli/jutge_cli/commands/upload.py", line 60, in __init__
    glob('{}/{}*'.format(set_name,subcode)))[0]
IndexError: list index out of range

This is caused because it cannot find the first problem in the set on the archive.

Desired behaviour

Warn about the missing problem and proceed to the next one