[gegl] tests/gamma: do not use JPG as source image

[Ãyvind KolÃs <ok src gnome org>]

commit ac084efe6fcb609f87b94f7ff448ea1e697c1e0d
Author: Ãyvind KolÃs <pippin gimp org>
Date:   Thu Feb 7 09:03:48 2013 +1100

    tests/gamma: do not use JPG as source image
    
    The gamma test has been failing on various machines, initial suspicions were
    towards the 64bit and maths implementations, it turned out that different
    versions of libjpeg was causing it. Using a PNG image should prove more stable
    for this test.
    
    Hopefully this fixes bug #666417

 tests/compositions/gamma.xml           |    2 +-
 tests/compositions/reference/gamma.png |  Bin 161310 -> 1204753 bytes
 2 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/tests/compositions/gamma.xml b/tests/compositions/gamma.xml
index 7978cc7..706ba68 100644
--- a/tests/compositions/gamma.xml
+++ b/tests/compositions/gamma.xml
@@ -7,7 +7,7 @@
   </node>
   <node operation='gegl:load'>
     <params>
-      <param name='path'>data/parliament_0.jpg</param>
+      <param name='path'>data/car-stack.png</param>
     </params>
   </node>
 </gegl>
diff --git a/tests/compositions/reference/gamma.png b/tests/compositions/reference/gamma.png
index 842d53b..4bfcf4d 100644
Binary files a/tests/compositions/reference/gamma.png and b/tests/compositions/reference/gamma.png differ