[Lazarus] Bug in SaveDialog with overwrite prompt (MAC Only). Patch included

[Torsten Bonde Christiansen]

Hi List

I have discovered a bug in SaveDialog (and OpenDialog) on MAC, where a 
user in some
situations is NOT shown an overwrite prompt, even if the dialog is 
executed with
ofOverWritePrompt (for OpenDialog there is similar problem with 
ofAllowMultiSelect).

I have created a bugreport: http://bugs.freepascal.org/view.php?id=20149 
and included
a patch for the bug.

I think this is a rather serious bug, since a user can overwrite own 
files without
a warning and would be glad if the patch is merged into trunk very soon.

Kind regards,
Torsten Bonde Christiansen.