Add PrivData() field to wxPrintData since MSW's printer

sometimes seem to save data in an extra field. The
    original author of the patch chose to save it in char*
    so I kept that, although void* would probably be correct.
    The patch is against 2.4.2 and the code has been reshuffled
    since then so that the patch had to be redone entirely.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@32443 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/printdlg.cpp

@@ -279,6 +279,11 @@ bool wxWindowsPrintNativeData::TransferTo( wxPrintData &data )
         else
             data.SetQuality( wxPRINT_QUALITY_HIGH );
 
+        if (devMode->dmDriverExtra > 0)
+            data.SetPrivData( (char *)devMode+devMode->dmSize, devMode->dmDriverExtra );
+        else
+            data.SetPrivData( NULL, 0 );
+
         GlobalUnlock(hDevMode);
     }
 
@@ -469,6 +474,12 @@ bool wxWindowsPrintNativeData::TransferFrom( const wxPrintData &data )
         }
         devMode->dmPrintQuality = quality;
         devMode->dmFields |= DM_PRINTQUALITY;
+        
+        if (data.GetPrivDataLen() > 0)
+        {
+            memcpy( (char *)devMode+devMode->dmSize, data.GetPrivData(), data.GetPrivDataLen() );
+            devMode->dmDriverExtra = data.GetPrivDataLen();
+        }
 
         if (data.GetBin() != wxPRINTBIN_DEFAULT)
         {