[perl #56868] [PATCH] Another attempt to add a function for empty const string

The const string bug has been solved, so this patch is less useful. Also, some benchmarking shows no significant improvements. So, ticket rejected.

[perl #56868] [PATCH] Another attempt to add a function for empty const string

# New Ticket Created by NotFound # Please include the string: [perl #56868] # in the subject line of all future correspondence about this issue. # http://rt.perl.org/rt3/Ticket/Display.html?id=56868 > This is another attempt to add a Parrot_string_empty function to replace a lot of CONST_STRI