Replace multi-line macro with const variable
Fixes Issue 10419 - ICE when lvalue check returns false on function return type.
Merge pull request #2234 from AndrejMitrovic/Fix10419

Issue 10419 - ICE when lvalue check returns false on function return type
Merge pull request #2233 from yebblies/multiline

[DDMD] Replace multi-line macro with const variable