Simplify formats accumulation for f4m/m3u8/smil formats

Now all _extract_*_formats routines return a list

1 files changed, 4 insertions, 8 deletions

diff --git a/youtube_dl/extractor/bloomberg.py b/youtube_dl/extractor/bloomberg.py
index ebeef8f2a..13343bc25 100644
--- a/youtube_dl/extractor/bloomberg.py
+++ b/youtube_dl/extractor/bloomberg.py
@@ -41,15 +41,11 @@ class BloombergIE(InfoExtractor):
             if not stream_url:
                 continue
             if stream['muxing_format'] == 'TS':
-                m3u8_formats = self._extract_m3u8_formats(
-                    stream_url, video_id, 'mp4', m3u8_id='hls', fatal=False)
-                if m3u8_formats:
-                    formats.extend(m3u8_formats)
+                formats.extend(self._extract_m3u8_formats(
+                    stream_url, video_id, 'mp4', m3u8_id='hls', fatal=False))
             else:
-                f4m_formats = self._extract_f4m_formats(
-                    stream_url, video_id, f4m_id='hds', fatal=False)
-                if f4m_formats:
-                    formats.extend(f4m_formats)
+                formats.extend(self._extract_f4m_formats(
+                    stream_url, video_id, f4m_id='hds', fatal=False))
         self._sort_formats(formats)
 
         return {