Document pango_layout_set_width as getting width in Pango units.
Document pango_layout_set_width as getting width in Pango units.

OpenInkpot-archive/iplinux-pango1.0,Distrotech/pango,bratsche/pango,zsx/pango,bratsche/pango,OpenInkpot-archive/iplinux-pango1.0,zsx/pango,kari-lentz/alpha-pango,bratsche/pango,bratsche/pango,zsx/pango,kari-lentz/alpha-pango,OpenInkpot-archive/iplinux-pango1.0,kari-lentz/alpha-pango,danny-ku/pango,Distrotech/pango,zsx/pango,danny-ku/pango,kari-lentz/alpha-pango,danny-ku/pango,Distrotech/pango