added the m_nativeSizeEvents flag, which is true only for the OpenGL canvas,
i.e. the wxGLCanvas will emit a size event, when (and not before) the X11
window that is used for OpenGl output really has that size (as reported by
added the m_nativeSizeEvents flag, which is true only for the OpenGL canvas,
i.e. the wxGLCanvas will emit a size event, when (and not before) the X11
window that is used for OpenGl output really has that size (as reported by