We need to silence the warning about this because Steinberg doesn't
declare their base class destructors as virtual (because of Windows ABI
compatibility issues). But we can still do it inside of yabridge to have
at least a bit more safety.
I'm not a fan of Hungarian notation, but C++ kind of needs it with its
implicit `this`. And of all the common options for this, I find
suffixing members with an underscore the least offensive one.
Apparently this can actually make a difference in some cases, and the
C++ Core Guideliens recommend doing this on all default constructors,
destructors, and all functions that can not throw (and thus also don't
allocate).