Fix some typos in the display list device.
Fix some typos in the display list device.

darcs-hash:20100413121713-f546f-2c1c1cdd143faf60adaa6e0a3291b7ffb500fd07.gz

nqv/mupdf,nqv/mupdf,nqv/mupdf,nqv/mupdf,nqv/mupdf,nqv/mupdf