[gtk-osx] libpng 1.6.34

[John Ralls <jralls src gnome org>]

commit 6baa27ea0ef598e286bcea6166d43aae8713d753
Author: Antoine Martin <antoine nagafix co uk>
Date:   Sat Jan 6 16:26:40 2018 +0700

    libpng 1.6.34
    
    Important security update to libpng, for details see:
    http://www.libpng.org/pub/png/libpng.html

 modulesets-stable/gtk-osx-bootstrap.modules |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/modulesets-stable/gtk-osx-bootstrap.modules b/modulesets-stable/gtk-osx-bootstrap.modules
index 69f8e20..dd2461b 100644
--- a/modulesets-stable/gtk-osx-bootstrap.modules
+++ b/modulesets-stable/gtk-osx-bootstrap.modules
@@ -35,8 +35,12 @@
   </autotools>
   
   <autotools id="libpng" autogenargs="--enable-shared" autogen-sh="configure">
-    <branch version="1.6.29" module="libpng/libpng-1.6.29.tar.xz"
+    <branch version="1.6.34" module="libpng/libpng-1.6.34.tar.xz"
+            hash="sha256:2f1e960d92ce3b3abd03d06dfec9637dfbd22febf107a536b44f7a47c60659f6"
             repo="sourceforge"/>
+    <dependencies>
+      <dep package="zlib"/>
+    </dependencies>
   </autotools>
 
   <autotools id="libjpeg" autogen-sh="configure">