Handle when no choices available in list_input

Author: miketwo

displayer.py

@@ -95,7 +95,8 @@ def list_input(input_string: str, choices: list, displayer: Callable,
     """Allows the player to choose from a certain list of options. Includes validation."""
     if extra_allowables is None:
         extra_allowables = []
-    if len(choices) + len(extra_allowables) == 0:
+    valid_choices = [choice for choice in choices if validator(choice)] + extra_allowables
+    if len(valid_choices) == 0:
         ansiprint("<red>There are no valid choices.</red>")
         return None
     # Automatically choose the only option if there is only one