Fix ownership transfer in SetDataObject

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxPython/trunk@74667 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Updated wx.lib.pdfviewer with patches from David Hughes.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxPython/trunk@74668 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
reswigged

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxPython/trunk@74669 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
reswigged

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxPython/trunk@74670 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
reswigged

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxPython/trunk@74671 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775