Description

This is a temporary workaround for the method pyrogram.raw.core.List
The write method can be called by RpcResult and when the query is GetDialogFilters (Which the result is empty by default)
The error will be TypeError: 'NoneType' does not support the buffer interface

Steps to reproduce

For error:

from io import BytesIO
b = BytesIO()
b.write(None)
# > TypeError: 'NoneType' does not support the buffer interface

What actually happened:

# RpcResult > write()
b.write(self.result.write())  # Where self.result is a pyrogram.raw.core.List([])

When pyrogram.raw.core.List.write is called, it will call TLObject.write (class List(TList[Any], TLObject):), but it will return a None type since it's a empty function

The reason I opened this PR is to ask is there any other workaround, the code quality of this looks bad.