Don't set PAGESETUPDLG::hDevNames and hDevMode when using PSD_RETURNDEFAULT.

If the page setup dialog is used to retrieve the default information, hDevMode
and hDevNames fields must not be set, otherwise PageSetupDlg() function simply
fails because of incorrect parameters passed to it.

Closes #13928.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@70516 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775