Checkmk Werk 15491: Fix possible crash on editing pagetypes

ID: 15491 Title: Fix possible crash on editing pagetypes Component: Multisite Level: 1 Class: Bug fix Version: 2.2.0b8 If you edited pagetypes like topics, custom graphs, etc. and tried to save an unallowed value, e.g. float instead of integer for "Sort order", the error "UnboundLocalError: cannot access local variable 'new_page_dict' where it is not associated with a value" occurred. You will now get a message which value is wrong to correct it before saving the pagetype.