JAL-1691 defensive check for null

[jalview.git] / src / jalview / datamodel / HiddenSequences.java

diff --git a/src/jalview/datamodel/HiddenSequences.java b/src/jalview/datamodel/HiddenSequences.java
index 1dcf655..929e56e 100755 (executable)
--- a/src/jalview/datamodel/HiddenSequences.java
+++ b/src/jalview/datamodel/HiddenSequences.java
@@ -1,6 +1,6 @@
 /*
- * Jalview - A Sequence Alignment Editor and Viewer (Version 2.8.2b1)
- * Copyright (C) 2014 The Jalview Authors
+ * Jalview - A Sequence Alignment Editor and Viewer ($$Version-Rel$$)
+ * Copyright (C) $$Year-Rel$$ The Jalview Authors
  * 
  * This file is part of Jalview.
  * 
@@ -278,11 +278,14 @@ public class HiddenSequences
 
   public boolean isHidden(SequenceI seq)
   {
-    for (int i = 0; i < hiddenSequences.length; i++)
+    if (hiddenSequences != null)
     {
-      if (hiddenSequences[i] != null && hiddenSequences[i] == seq)
+      for (int i = 0; i < hiddenSequences.length; i++)
       {
-        return true;
+        if (hiddenSequences[i] != null && hiddenSequences[i] == seq)
+        {
+          return true;
+        }
       }
     }