gstreamer: 1.12.2 -> 1.12.3

pkgs/development/libraries/gstreamer/libav/default.nix

@@ -9,7 +9,7 @@
 assert withSystemLibav -> libav != null;
 
 stdenv.mkDerivation rec {
-  name = "gst-libav-1.12.2";
+  name = "gst-libav-1.12.3";
 
   meta = {
     homepage = https://gstreamer.freedesktop.org;
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
 
   src = fetchurl {
     url = "${meta.homepage}/src/gst-libav/${name}.tar.xz";
-    sha256 = "1crdahkjm23byg1awcrjkmgfbalfpvvac7h7whm6b2r1pfwkbdsv";
+    sha256 = "0l4nc6ikdx49l7bdrk3bd9p3pzry8a328r22zg48gyzpnv5ghph1";
   };
 
   outputs = [ "out" "dev" ];