In the case when the virtual function returns by ref we need to convert the
return storage properly and adjust the function call. Eg:
virtual const MyClass& getMyClass();

void trampoline(..., MyClass** __Res) {
  if(__Res)
    *__Res = &getMyClass();
  ...
}


git-svn-id: https://root.cern.ch/svn/root/trunk@48560 27541ba8-7e3a-0410-8455-c3a389f83636
Explicitly ignore warning about not passing literal in the trampoline function ... that is by definition spurrious/unavoidable


git-svn-id: https://root.cern.ch/svn/root/trunk@48561 27541ba8-7e3a-0410-8455-c3a389f83636