[gnumeric] win32: update png to 1.2.50

[Morten Welinder <mortenw src gnome org>]

commit 52e0bdbfc1afa91a77246b40a542ea32b983b18b
Author: Morten Welinder <terra gnome org>
Date:   Wed Jul 17 23:10:31 2013 -0400

    win32: update png to 1.2.50
    
    That's isn't recent.  Might want to consider using 1.5.x; 1.6.x requires
    a newer auto-something than I have.

 tools/win32/moduleset.in |   10 +++++-----
 1 files changed, 5 insertions(+), 5 deletions(-)
---
diff --git a/tools/win32/moduleset.in b/tools/win32/moduleset.in
index ad883a8..351ebfe 100644
--- a/tools/win32/moduleset.in
+++ b/tools/win32/moduleset.in
@@ -66,7 +66,7 @@
     </autotools>
 
     <autotools id="glib">
-       <branch repo="gnome.org" module="sources/glib/2.26/glib-2.26.0.tar.bz2" version="2.26.0">
+       <branch repo="gnome.org" module="sources/glib/2.37/glib-2.37.4.tar.xz" version="2.37.4">
            <patch file="&patch_dir;glib-win32-cachefile.patch.gz"/>
            <patch file="&patch_dir;glib-goption-disable-localization.patch" strip="1"/>
            <patch file="&patch_dir;glib-disable-python.patch" strip="1"/>
@@ -89,10 +89,10 @@
            <patch file="http://gnome.org/~aruiz/gtk+/patches/jpeg_mingwport.patch"; strip="1"/>
        </patches>
     </tarball>
-    <autotools id="png" autogen-sh="autogen.sh&amp;&amp;./configure"  skip-autogen="never">
-       <branch repo="simplesystems.org" module="libpng-1.2.44.tar.bz2"
-               version="1.2.44">
-           <patch file="&patch_dir;png-symbols.patch"/>
+    <autotools id="png" autogen-sh="autoreconf">
+       <branch repo="simplesystems.org" module="libpng12/libpng-1.2.50.tar.xz"
+               version="1.2.50">
+         <patch file="&patch_dir;png-symbols.patch"/>
        </branch>
        <dependencies>
            <dep package="zlib"/>