null point bug fixed

diff --git a/src/jalview/gui/SeqPanel.java b/src/jalview/gui/SeqPanel.java
index 255be5d..55bec56 100755 (executable)
--- a/src/jalview/gui/SeqPanel.java
+++ b/src/jalview/gui/SeqPanel.java
@@ -388,7 +388,8 @@ public class SeqPanel extends JPanel
     oldSeq = seq;\r
 \r
     SequenceI sequence = (Sequence) av.getAlignment().getSequenceAt(seq);\r
-    if(res>sequence.getLength())\r
+\r
+    if(sequence==null || res>sequence.getLength())\r
       return;\r
 \r
     stretchGroup = av.getSelectionGroup();\r