Signed-off-by: CN_SZTL <cnsztl@project-openwrt.eu.org>
this_prefix has been given in wx-config, so the result of is_installed isn't proper ``` if is_installed; then _include_cppflags="-I${includedir}/wx-2.8" else _include_cppflags="-I${includedir} -I${prefix}/contrib/include" fi ```