From: Nick Bowler <nbowler@draconx.ca>
Date: Fri, 14 Jun 2013 22:15:25 +0000 (-0400)
Subject: lbximg: Make libpng a soft dependency.
X-Git-Url: https://git.draconx.ca/gitweb/liblbx.git/commitdiff_plain/b54180ad4297cf2d3fd943bf78976f8d34d5eea9?hp=b54180ad4297cf2d3fd943bf78976f8d34d5eea9

lbximg: Make libpng a soft dependency.

Now that we have Netpbm output formats which do not depend on
any external libraries, we can make it possible to build lbximg
without libpng.  Adjust the build system so that lbximg is built
unconditionally and PNG output can be selectively disabled.
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