[Bug 53935] __unDName doesn't support 'G' and 'H' modifiers

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=53935

--- Comment #5 from Eric Pouech  ---
(In reply to Rafał Mużyło from comment #3)
> On a related, yet unrelated note: winedump fails on demangling at very least
> multilevel C++ symbols (something like Class::Object()::func()).

yes the code in winedump and the code in msvcrt/undname.c have diverged over
time (lots other features are missing from winedump, like templates and other
related C++ goodies)