Suppress the warnings about comparing floating point values for equality in wxWidgets headers when the user code is compiled with -Wfloat-equal (at least when using g++ 4.6 or later). Closes #14895. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73280 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775