We now have libpng 1.6. If we build libpng12 as well as libpng 1.6, the 1.2 version gets 
preferred which is not desirable and does not give deterministic builds.

We really do want to use libpng since the item in DEPENDS will provide this so
manipulate the search list so the one we DEPEND on gets chosen.

RP 2013/4/13

Upstream-Status: Pending [worth discussing at least]

Index: gdk-pixbuf-2.26.5/configure.ac
===================================================================
--- gdk-pixbuf-2.26.5.orig/configure.ac	2013-03-26 15:45:16.594820303 +0000
+++ gdk-pixbuf-2.26.5/configure.ac	2013-04-13 10:15:19.241433789 +0000
@@ -588,7 +588,7 @@
 
 dnl Test for libpng
   if test x$with_libpng != xno && test -z "$LIBPNG"; then
-    for l in libpng15 libpng14 libpng12 libpng13 libpng10 libpng ; do
+    for l in libpng libpng15 libpng14 libpng12 libpng13 libpng10 ; do
       AC_MSG_CHECKING(for $l)
       if $PKG_CONFIG --exists $l ; then
         AC_MSG_RESULT(yes)