fix: Fix issue with resolved data for mentionable option type (#916)

Author: EepyElvyra

interactions/api/gateway/client.py

@@ -571,13 +571,13 @@ def __option_type_context(self, context: "_Context", type: int) -> dict:
         elif type == OptionType.ATTACHMENT.value:
             _resolved = context.data.resolved.attachments
         elif type == OptionType.MENTIONABLE.value:
+            _roles = context.data.resolved.roles if context.data.resolved.roles is not None else {}
+            _members = (
+                context.data.resolved.members if context.guild_id else context.data.resolved.users
+            )
             _resolved = {
-                **(
-                    context.data.resolved.members
-                    if context.guild_id
-                    else context.data.resolved.users
-                ),
-                **context.data.resolved.roles,
+                **(_members if _members is not None else {}),
+                **_roles,
             }
         return _resolved