[poppler] Poppler 0.26.1 released

[Albert Astals Cid]

Available from
http://poppler.freedesktop.org/poppler-0.26.2.tar.xz

Changes against 0.26.1:
core:
 * Make sure we have an xref before using. KDE Bug #335413

build system:
 * autoconf: Fix typo in configure.ac

utils:
 * pdftohtml: exit with 0 with -v and -h

Cheers,
  Albert

P.S: I know bugs with patches are piling up, i just don't have time for 
reviewing them, anyone else reviewing someone elses patches is as always very 
much appreciated