From 13dcb16e603d32b8788789d957b2900d5c8c7021 Mon Sep 17 00:00:00 2001
From: roby <roby@ipac.caltech.edu>
Date: Wed, 7 Sep 2022 12:51:46 -0600
Subject: [PATCH] IRSA-4793: fixed: three color bug- failed on red disabled

---
 .../edu/caltech/ipac/visualize/plot/plotdata/ImageStretch.java  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/firefly/java/edu/caltech/ipac/visualize/plot/plotdata/ImageStretch.java b/src/firefly/java/edu/caltech/ipac/visualize/plot/plotdata/ImageStretch.java
index c2ef6eed4b..6e875657a7 100644
--- a/src/firefly/java/edu/caltech/ipac/visualize/plot/plotdata/ImageStretch.java
+++ b/src/firefly/java/edu/caltech/ipac/visualize/plot/plotdata/ImageStretch.java
@@ -20,7 +20,7 @@
 public class ImageStretch {
 
     private static boolean isHuePreserving(RangeValues rv) {
-        return rv.rgbPreserveHue();
+        return rv!=null ? rv.rgbPreserveHue() : false;
     }