Fixed bug concerning uninitialized refcounting for images.
Fixed bug concerning uninitialized refcounting for images.

darcs-hash:20080321003523-f546f-2f7fd08ad07e9c1c8b7c4ab56fdce9af4e09acdc.gz

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