websocket: default to error code 500 on any websocket error

src/kemal/websocket.cr

@@ -39,13 +39,13 @@ module Kemal
           @proc.call(socket, context)
           socket.run
         rescue error : Exception
+          # TODO: check if 500 is what we're supposed to give
+          context.response.status_code = 500
+
           if error.is_a?(WebsocketError)
-            # TODO
-            context.response.status_code = 500
             code = error.code.to_i16
             message = error.status_message
           else
-            context.response.status_code = error.code
             code = 1011_i16
             message = "Exception"
           end