[gegl] tests: Don't perform color comparisons on fully transparent values

[Téo Mazars <teom src gnome org>]

commit 9ee8bef9b76fc105a3217a03b38da610cde3f127
Author: Téo Mazars <teo mazars ensimag fr>
Date:   Sun Jul 14 08:54:37 2013 +0200

    tests: Don't perform color comparisons on fully transparent values

 tests/compositions/reference/softglow.png |  Bin 1265227 -> 1208320 bytes
 tests/compositions/softglow.xml           |    8 ++++++++
 2 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/tests/compositions/reference/softglow.png b/tests/compositions/reference/softglow.png
index 83e438b..fb8dcf8 100644
Binary files a/tests/compositions/reference/softglow.png and b/tests/compositions/reference/softglow.png 
differ
diff --git a/tests/compositions/softglow.xml b/tests/compositions/softglow.xml
index a65d6de..15333de 100644
--- a/tests/compositions/softglow.xml
+++ b/tests/compositions/softglow.xml
@@ -1,5 +1,13 @@
 <?xml version='1.0' encoding='UTF-8'?>
 <gegl>
+  <node operation='gegl:crop'>
+    <params>
+      <param name='x'>0</param>
+      <param name='y'>0</param>
+      <param name='width'>512</param>
+      <param name='height'>384</param>
+    </params>
+  </node>
   <node operation='gegl:softglow'>
     <params>
       <param name='glow-radius'>10.0</param>