[arte] Prefer vídeos without subtitles in the same language (fixes #1173) and fix crash when there's no description
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		@@ -85,7 +85,7 @@ class ArteTvIE(InfoExtractor):
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        info_dict = {'id': player_info['VID'],
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                     'title': player_info['VTI'],
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                     'description': player_info['VDE'],
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                     'description': player_info.get('VDE'),
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                     'upload_date': unified_strdate(player_info['VDA'].split(' ')[0]),
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                     'thumbnail': player_info['programImage'],
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                     'ext': 'flv',
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@@ -104,6 +104,8 @@ class ArteTvIE(InfoExtractor):
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        formats = filter(_match_lang, formats)
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        # We order the formats by quality
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        formats = sorted(formats, key=lambda f: int(f['height']))
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        # Prefer videos without subtitles in the same language
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        formats = sorted(formats, key=lambda f: re.match(r'VO(F|A)-STM\1', f['versionCode']) is None)
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        # Pick the best quality
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        format_info = formats[-1]
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        if format_info['mediaType'] == u'rtmp':
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