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/dailymotion.py b/youtube_dl/extractor/dailymotion.py
index 0c5b6617f..439fd42e8 100644
--- a/youtube_dl/extractor/dailymotion.py
+++ b/youtube_dl/extractor/dailymotion.py
@@ -148,15 +148,11 @@ class DailymotionIE(DailymotionBaseInfoExtractor):
                         continue
                     ext = determine_ext(media_url)
                     if type_ == 'application/x-mpegURL' or ext == 'm3u8':
-                        m3u8_formats = self._extract_m3u8_formats(
-                            media_url, video_id, 'mp4', m3u8_id='hls', fatal=False)
-                        if m3u8_formats:
-                            formats.extend(m3u8_formats)
+                        formats.extend(self._extract_m3u8_formats(
+                            media_url, video_id, 'mp4', m3u8_id='hls', fatal=False))
                     elif type_ == 'application/f4m' or ext == 'f4m':
-                        f4m_formats = self._extract_f4m_formats(
-                            media_url, video_id, preference=-1, f4m_id='hds', fatal=False)
-                        if f4m_formats:
-                            formats.extend(f4m_formats)
+                        formats.extend(self._extract_f4m_formats(
+                            media_url, video_id, preference=-1, f4m_id='hds', fatal=False))
                     else:
                         f = {
                             'url': media_url,