[dailymotion] Fix subtitles extraction

youtube_dl/extractor/dailymotion.py

@@ -174,7 +174,9 @@ class DailymotionIE(DailymotionBaseInfoExtractor):
             uploader_id = metadata.get('owner', {}).get('id')
 
             subtitles = {}
-            for subtitle_lang, subtitle in metadata.get('subtitles', {}).get('data', {}).items():
+            subtitles_data = metadata.get('subtitles', {}).get('data', {})
+            if subtitles_data and isinstance(subtitles_data, dict):
+                for subtitle_lang, subtitle in subtitles_data.items():
                     subtitles[subtitle_lang] = [{
                         'ext': determine_ext(subtitle_url),
                         'url': subtitle_url,