[prosiebensat1] Fix bitrate calculation

youtube_dl/extractor/prosiebensat1.py

@@ -249,7 +249,7 @@ class ProSiebenSat1IE(InfoExtractor):
             urls_sources = urls_sources.values()
 
         def fix_bitrate(bitrate):
-            return bitrate / 1000 if bitrate % 1000 == 0 else bitrate
+            return (bitrate // 1000) if bitrate % 1000 == 0 else bitrate
 
         for source in urls_sources:
             protocol = source['protocol']