Corrected code that re-encodes the book title.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73762 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Don't use GetStandardCmdLineOptions() under non-Unix platforms.

The GTK+ standard options are only available under Unix.

Closes #15131.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73764 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775