[gimp] build/win: Upgrade libpng to 1.6.6

[Michael Henning <mhenning src gnome org>]

commit fdc5dc313239fa372898e13c69e0591645d0f1fb
Author: Michael Henning <drawoc darkrefraction com>
Date:   Sun Oct 6 16:12:43 2013 -0400

    build/win: Upgrade libpng to 1.6.6

 build/windows/jhbuild/imglibs.moduleset |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/build/windows/jhbuild/imglibs.moduleset b/build/windows/jhbuild/imglibs.moduleset
index 9ccc721..531f3b8 100644
--- a/build/windows/jhbuild/imglibs.moduleset
+++ b/build/windows/jhbuild/imglibs.moduleset
@@ -21,9 +21,9 @@
 </autotools>
 
 <autotools id="libpng" autogen-sh="configure">
-       <branch version="1.6.3" repo="sf.net"
-                       module="libpng/libpng16/1.6.3/libpng-1.6.3.tar.xz"
-                       hash="sha1:adc60a2c117a0929e18bf357e0a1e6115a9e3b76">
+       <branch version="1.6.6" repo="sf.net"
+                       module="libpng/libpng16/1.6.6/libpng-1.6.6.tar.xz"
+                       hash="sha1:4c90b5f648e18c285f64f63dfb82665cadefcdb6">
        </branch>
        <dependencies>
                <dep package="zlib"/>