In xine-lib-1.1.3, the freetype and fontconfig option that associated to the truetype IUSE flag should pass --with-{freetype,fontconfig} to configure script, not --enable-*. With the incorrect ebuild, xine-lib with truetype IUSE will not enable fontconfig&freetype support.
Created attachment 103324 [details, diff] A simple patch that fix the issue.
Thanks for reporting, I've missed it (and I feel ashamed as I was the one adding the options in the first place, sigh :P). Fixed now, thanks!