AttributeError: exception for NoneType

[simone1998]

During run on Debian based distro (Parrot) and recovering data from a Samsung S3 New, when click
on extract (via ADB)

1. without check "use AB method" and "extract shared storage" i get this
   INFO:andriller.windows:Acquiring data...
   INFO:andriller.windows:Acquiring databases via root...
   Exception in thread Thread-3:
   Traceback (most recent call last):
   File "/usr/lib/python3.8/threading.py", line 932, in _bootstrap_inner
   self.run()
   File "/usr/lib/python3.8/threading.py", line 870, in run
   self._target(*self._args, **self._kwargs)
   File "/home/simo/env/lib/python3.8/site-packages/andriller/utils.py", line 40, in command
   return method(self, *args, **kwargs)
   File "/home/simo/env/lib/python3.8/site-packages/andriller/windows.py", line 534, in RunUsbExtraction
   drill.DataAcquisition(
   File "/home/simo/env/lib/python3.8/site-packages/andriller/driller.py", line 307, in DataAcquisition
   self.download_file(file_path)
   File "/home/simo/env/lib/python3.8/site-packages/andriller/driller.py", line 202, in download_file
   remote_size = self.adb.get_size(file_path, su=self.su)
   File "/home/simo/env/lib/python3.8/site-packages/andriller/adb_conn.py", line 172, in get_size
   if not size.isdigit():
   AttributeError: 'NoneType' object has no attribute 'isdigit'

2. check both andriller not recover any files

Thanks (I hope not make a mistake)

[den4uk]

The bug was in the file size retrieval code. This has been addressed in #38.