Use dummy but valid [0, 1] range instead of invalid [0, 0] one. Closes #12828. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@66547 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Use dummy but valid [0, 1] range instead of invalid [0, 0] one. Closes #12828. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@66547 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775