pango: fix wrong index access of Pango::GlyphString#glyphs
pango: fix wrong index access of Pango::GlyphString#glyphs

[ruby-gnome2-devel-ja]

Reported by Kentaro Fukuchi. Thanks!!!

kitachro/ruby-gnome2,kitachro/ruby-gnome2,kitachro/ruby-gnome2,kitachro/ruby-gnome2,kitachro/ruby-gnome2