[libpng] Update to libpng 1.5.7

[Tom Lane]

commit be5c398bcd444f988f29d166071029fa1424c112
Author: Tom Lane <tgl at redhat.com>
Date:   Sun Dec 18 16:37:00 2011 -0500

    Update to libpng 1.5.7

 .gitignore  |    2 +-
 libpng.spec |    7 +++++--
 sources     |    2 +-
 3 files changed, 7 insertions(+), 4 deletions(-)
---
diff --git a/.gitignore b/.gitignore
index 3c3e3b6..5378425 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,2 @@
-/libpng-1.5.6.tar.bz2
+/libpng-1.5.7.tar.bz2
 /libpng-1.2.46.tar.bz2
diff --git a/libpng.spec b/libpng.spec
index 2316a82..36a3850 100644
--- a/libpng.spec
+++ b/libpng.spec
@@ -1,8 +1,8 @@
 Summary: A library of functions for manipulating PNG image format files
 Name: libpng
 Epoch: 2
-Version: 1.5.6
-Release: 2%{?dist}
+Version: 1.5.7
+Release: 1%{?dist}
 License: zlib
 Group: System Environment/Libraries
 URL: http://www.libpng.org/pub/png/
@@ -140,6 +140,9 @@ rm -rf $RPM_BUILD_ROOT%{_libdir}/*.la
 rm -rf $RPM_BUILD_ROOT
 
 %changelog
+* Sun Dec 18 2011 Tom Lane <tgl at redhat.com> 2:1.5.7-1
+- Update to libpng 1.5.7, for assorted minor fixes
+
 * Mon Nov 21 2011 Tom Lane <tgl at redhat.com> 2:1.5.6-2
 - Don't include libpng12.pc in the compat subpackage; instead just offer a
   phony Provides: for it in the devel subpackage
diff --git a/sources b/sources
index 5d38bce..c600adb 100644
--- a/sources
+++ b/sources
@@ -1,2 +1,2 @@
-2107095191b0e8bd9a0f4f930c1948c3  libpng-1.5.6.tar.bz2
+590ecbecd6286810184fd3e66f151de3  libpng-1.5.7.tar.bz2
 e8b43dc78ef95b3949af7f961d76874b  libpng-1.2.46.tar.bz2