Fix auto_locale_strings when no choices are given

discord/app_commands/transformers.py

@@ -185,6 +185,7 @@ class CommandParameter:
         if isinstance(self.description, str):
             self.description = locale_str(self.description)
 
+        if self.choices:
             for choice in self.choices:
                 if choice._locale_name is None:
                     choice._locale_name = locale_str(choice.name)