null pointer bugfix

diff --git a/src/jalview/datamodel/AlignmentAnnotation.java b/src/jalview/datamodel/AlignmentAnnotation.java
index b59417a..8cfe728 100755 (executable)
--- a/src/jalview/datamodel/AlignmentAnnotation.java
+++ b/src/jalview/datamodel/AlignmentAnnotation.java
@@ -357,6 +357,11 @@ Loading...
    */
   public void restrict(int startRes, int endRes)
   {
+    if (annotations==null)
+    {
+      // non-positional
+      return;
+    }
     if (startRes<0)
       startRes=0;
     if (startRes>=annotations.length)