I'm not totally sure when they were added, but the cairo_image_surface_get_[width|height] functions are not available in cairo 1.10.2.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77735 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775