if seq<0, return

diff --git a/src/jalview/appletgui/SeqPanel.java b/src/jalview/appletgui/SeqPanel.java
index 51cb844..9a5863f 100755 (executable)
--- a/src/jalview/appletgui/SeqPanel.java
+++ b/src/jalview/appletgui/SeqPanel.java
@@ -231,7 +231,7 @@ public class SeqPanel
     int res = findRes(evt);\r
     int seq = findSeq(evt);\r
 \r
-    if (seq >= av.getAlignment().getHeight())\r
+    if (seq >= av.getAlignment().getHeight() || seq<0)\r
     {\r
       return;\r
     }\r