Avoid calling GeTDPI() in font.WXAdjustToPPI(GetDPI()); invocations in common code on platforms that don't need any adjustment (i.e. anything other than MSW). This fixes wxOSX crashes when GetFont() is called too early during window creation, but is the right thing to do regardless. Closes https://github.com/wxWidgets/wxWidgets/pull/2036 Closes #18903.