Merge pull request #2061 from rzhxeo/var

Correct variable name in YoutubeDL.list_formats

diff --combined youtube_dl/YoutubeDL.py
index 738304193f71e10eef3656dd17e3606a69bdc32f,ea98181cc9af8ce7f6d4909f245ff9fa10967450..0a4dbbbd940227621b4e31a1bdc6a3508dc2b9cb
--- 1/youtube_dl/YoutubeDL.py
--- 2/youtube_dl/YoutubeDL.py
+++ b/youtube_dl/YoutubeDL.py
@@@ -164,8 -164,6 +164,8 @@@ class YoutubeDL(object)
  
      def __init__(self, params=None):
          """Create a FileDownloader object with the given options."""
 +        if params is None:
 +            params = {}
          self._ies = []
          self._ies_instances = {}
          self._pps = []
@@@ -174,7 -172,7 +174,7 @@@
          self._num_downloads = 0
          self._screen_file = [sys.stdout, sys.stderr][params.get('logtostderr', False)]
          self._err_file = sys.stderr
 -        self.params = {} if params is None else params
 +        self.params = params
  
          if params.get('bidi_workaround', False):
              try:
@@@ -1016,7 -1014,7 +1016,7 @@@
      def list_formats(self, info_dict):
          def format_note(fdict):
              res = u''
-             if f.get('ext') in ['f4f', 'f4m']:
+             if fdict.get('ext') in ['f4f', 'f4m']:
                  res += u'(unsupported) '
              if fdict.get('format_note') is not None:
                  res += fdict['format_note'] + u' '