Fixing Freedesktop for awesome wm on arch full updated

Hi, i really appreciate your work. I was testing ur themas on my notebook and i problem.
I am running Archlinux full updated (3.14.4-1-ARCH) with awesome wm full updated (awesome v3.5.5) and Lua 5.2.3.

I got some problemas with freedesktop so i made 1 line changes to solve the problem.

Thank you for your work, and have a nice day.