[jwplatform] Fix typo

youtube_dl/extractor/jwplatform.py

@@ -44,7 +44,7 @@ class JWPlatformIE(InfoExtractor):
             source_url = self._proto_relative_url(source['file'])
             source_type = source.get('type') or ''
             if source_type == 'application/vnd.apple.mpegurl':
-                m3u8_formats = self._extract_m3u8_formats(source_url, video_id, 'mp4', 'm3u8_native', fatal=None)
+                m3u8_formats = self._extract_m3u8_formats(source_url, video_id, 'mp4', 'm3u8_native', fatal=False)
                 if m3u8_formats:
                     formats.extend(m3u8_formats)
             elif source_type.startswith('audio'):