from  Jean-Sbastien Mouret  <js@lrde.epita.fr>

        * configure.ac: Check for pnmdepth.

Index: olena/ChangeLog
from  Jean-Sbastien Mouret  <js@lrde.epita.fr>

        * oln/io/pnm_read.hxx: Change image2d<int_u8> readers to
        image2d<int_u<N>>.
        * oln/io/pnm_read_common.hxx (readmany_plain): Read many plain
        int_u<N> instead of int_u8.

        * tests/io/2d.cc (check): Add test for image2d<int_u16>.
        * img/Makefile.am: Generate lena16b.pgm and lena16b.ppgm.

    prcs2git-id: 8.29