jbu tests: saving images for comparisions
diff --git a/test/jbu/quality/util/RenderUtil.java b/test/jbu/quality/util/RenderUtil.java
index 2f6062c..b89bcb1 100644
--- a/test/jbu/quality/util/RenderUtil.java
+++ b/test/jbu/quality/util/RenderUtil.java
@@ -199,6 +199,7 @@
                 }
 
                 if (!failed) break;
+                ImageIO.write(image, "png", new File(testData, gfName + "_" + variant));
             }
 
             if (failed) throw new RuntimeException(failureReason.toString());