added libgphoto2-2.4.2 with a file listing length increase
A future version (beyond libgphoto2-2.4.3) will have this constant limit fixed: see https://sourceforge.net/tracker2/index.php?func=detail&aid=2055906&group_id=8874&atid=108874
libgphoto2-2.4.3 does not have this fix yet and libgphoto2-2.4.3 has EAPI="2", which requires =portage-2*
Increasing the constant number of images listable is the most practial way of fixing this. For an example, see http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=425515