Implement a better workaround for PDF files with off-by-one errors in the xref.
Implement a better workaround for PDF files with off-by-one errors in the xref.

darcs-hash:20080814234207-f546f-cb7ac2b1916cc3c27e20b642d3db727d678eff94.gz

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