Update print dialog data after printing successfully

This is necessary in order to get the information entered by the user in
the dialog and was already done in PrintDialog(), but not Print()
itself -- now do it there as well.

src/gtk/print.cpp

@@ -992,6 +992,8 @@ bool wxGtkPrinter::Print(wxWindow *parent, wxPrintout *printout, bool prompt )
         return false;
     }
 
+    m_printDialogData = dialog.GetPrintDialogData();
+
     sm_lastError = wxPRINTER_NO_ERROR;
     return true;
 }