X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Frenderer%2FResidueColourFinder.java;h=2e45117a97addbb20b908b77453ad74ee5f96981;hb=4435c731351c802772dd1355fdb5747cfacd7838;hp=2da7233193b2cf44275ee0f6d34fcabe810e395a;hpb=2d241446c80365862d31e76f2ecccaab33a1547f;p=jalview.git

diff --git a/src/jalview/renderer/ResidueColourFinder.java b/src/jalview/renderer/ResidueColourFinder.java
index 2da7233..2e45117 100644
--- a/src/jalview/renderer/ResidueColourFinder.java
+++ b/src/jalview/renderer/ResidueColourFinder.java
@@ -116,12 +116,13 @@ public class ResidueColourFinder
   public SequenceGroup getCurrentSequenceGroup(SequenceGroup[] allGroups,
           int res)
   {
-    if (allGroups == null)
+    int n;
+    if (allGroups == null || (n = allGroups.length) == 0)
     {
       return null;
     }
 
-    for (int i = 0; i < allGroups.length; i++)
+    for (int i = 0; i < n; i++)
     {
       if ((allGroups[i].getStartRes() <= res)
               && (allGroups[i].getEndRes() >= res))