#76 Fix for empty HTTP head requests

Related: https://github.com/ytdl-org/youtube-dl/issues/7181

Authored-by: shirtjs <2660574+shirtjs@users.noreply.github.com> (shirt-dev)

youtube_dlc/utils.py

@@ -2609,6 +2609,8 @@ class YoutubeDLHandler(compat_urllib_request.HTTPHandler):
 
     @staticmethod
     def deflate(data):
+        if not data:
+            return data
         try:
             return zlib.decompress(data, -zlib.MAX_WBITS)
         except zlib.error: