If sequence is null, dont add it

diff --git a/src/jalview/datamodel/SequenceGroup.java b/src/jalview/datamodel/SequenceGroup.java
index 2bdd5f8..dc22704 100755 (executable)
--- a/src/jalview/datamodel/SequenceGroup.java
+++ b/src/jalview/datamodel/SequenceGroup.java
@@ -119,6 +119,7 @@ public class SequenceGroup
       SequenceI [] seqs = new SequenceI[iSize];\r
       SequenceI [] inorder = getSequencesInOrder(align);\r
 \r
+\r
     for (int i = 0; i < iSize; i++)\r
     {\r
       SequenceI seq = inorder[i];\r
@@ -316,7 +317,7 @@ public class SequenceGroup
      */\r
     public void addSequence(SequenceI s, boolean recalc)\r
     {\r
-        if (!sequences.contains(s))\r
+        if (s!=null && !sequences.contains(s))\r
         {\r
             sequences.addElement(s);\r
         }\r