Dummy type required to parse delegates from a header

Delegate types aren't parsed unless the header file comes with a UCLASS/USTRUCT/UENUM

1. Open attached repro project
2. run the project as is to get error
3. uncomment the lines in "BrokenDelegate.h" and run

Result: Unrecognized type 'FTheDelegateThatYouJustMade' - type must be a UCLASS, USTRUCT or UENUM

Expected: Delegate type to be recognized without having to create a dummy type