Fix serialization of empty optional lists

compiler/api/compiler.py

@@ -444,7 +444,7 @@ def start(format: bool = False):
                     sub_type = arg_type.split("<")[1][:-1]
 
                     write_types += "\n        "
-                    write_types += f"if self.{arg_name}:\n            "
+                    write_types += f"if self.{arg_name} is not None:\n            "
                     write_types += "b.write(Vector(self.{}{}))\n        ".format(
                         arg_name, f", {sub_type.title()}" if sub_type in CORE_TYPES else ""
                     )

pyrogram/methods/messages/send_poll.py

@@ -131,15 +131,10 @@ class SendPoll:
                 await app.send_poll(chat_id, "Is this a poll question?", ["Yes", "No", "Maybe"])
         """
 
-        message, entities = (await utils.parse_text_entities(
+        solution, solution_entities = (await utils.parse_text_entities(
             self, explanation, explanation_parse_mode, explanation_entities
         )).values()
 
-        # For some reason passing None or [] as solution_entities will lead to INPUT_CONSTRUCTOR_INVALID_00
-        # Add a dummy message entity with no length as workaround
-        solution = message or None
-        solution_entities = entities or ([raw.types.MessageEntityBold(offset=0, length=0)] if solution else None)
-
         r = await self.invoke(
             raw.functions.messages.SendMedia(
                 peer=await self.resolve_peer(chat_id),