[REG] Use Dynamic Type option is not respected

Dynamic types are used whether the option is checked or not.

Break at the line with the comment - both objects are displayed as Derived.

Now step to the next line - both objects are displayed as Base.

This is the expected behavior when "Use Dynamic Type" is checked, but when it is unchecked - b should always be Base and d should always be Derived. That part is broken.

#include <new>

struct Base { virtual ~Base() {} };
struct Derived : Base { int a = 42; };

int main()
{
    char Buf[32];
    Derived *d = new(Buf) Derived;;
    Base *b = d;
    d->~Derived(); // BREAK_HERE
    return 0;
}

This happened long ago, reported as QTCREATORBUG-7504, and I fixed it. Now it happens again (I can't tell for sure on which version the regression was introduced).