Handle unzip errors on canned user data dir

[andrewleech]

ERROR: EXCEPTION Thrown (PythonToCppException) : -->Python callback/script returned the following error<--

• NOTE: IGNORING THIS CAN LEAD TO MEMORY LEAKS!
  Error Type: <class 'zipfile.BadZipfile'>
  Error Contents: Truncated central directory
  Traceback (most recent call last):
  File "C:\Users\sta\AppData\Roaming\XBMC\addons\plugin.video.netflixbmc\default.py", line 1089, in
  playVideoMain(url)

File "C:\Users\sta\AppData\Roaming\XBMC\addons\plugin.video.netflixbmc\default.py", line 638, in playVideoMain
launchChrome(url)
File "C:\Users\sta\AppData\Roaming\XBMC\addons\plugin.video.netflixbmc\default.py", line 657, in launchChrome
z = zipfile.ZipFile(zf)
File "C:\Program Files (x86)\XBMC\system\python\Lib\zipfile.py", line 766, in init
self._RealGetContents()
File "C:\Program Files (x86)\XBMC\system\python\Lib\zipfile.py", line 832, in _RealGetContents
raise BadZipfile("Truncated central directory")
BadZipfile: Truncated central directory
-->End of Python script error report<--
18:20:46 T:1160 ERROR: XFILE::CDirectory::GetDirectory - Error getting plugin://plugin.video.netflixbmc/?mode=playVideoMain&url=70286775
18:20:46 T:1160 ERROR: CGUIMediaWindow::GetDirectory(plugin://plugin.video.netflixbmc/?mode=playVideoMain&url=70286775) failed