gdiplus: Don't require an HDC for the convert_unit function.
[wine] / dlls / dmloader / dmloader.spec
1 @ stdcall -private DllCanUnloadNow()
2 @ stdcall -private DllGetClassObject(ptr ptr ptr)
3 @ stdcall -private DllRegisterServer()
4 @ stdcall -private DllUnregisterServer()