On http://www.red-bean.com/~decklin/software/aewm/ there's a newer version of aewm available. After copying files/1.2.3-freetype-gentoo.diff to files/1.2.7-freetype-gentoo.diff, I was able to build 1.2.7 with the unmodified ebuild of version 1.2.3.
I'll take care of this within the next few days if no one else does by then.
Fixed! Closing bug.