[API] fix https://github.com/lbryio/lbry/issues/1501

lbrynet/daemon/Publisher.py

@@ -68,7 +68,7 @@ class Publisher:
         )
         if stream_hash:  # the stream_hash returned from the db will be None if this isn't a stream we have
             yield self.storage.save_content_claim(
-                stream_hash.decode(), tx.outputs[0].id
+                stream_hash, tx.outputs[0].id
             )
             self.lbry_file = [f for f in self.lbry_file_manager.lbry_files if f.stream_hash == stream_hash][0]
         defer.returnValue(tx)