fix

git-svn-id: svn+ssh://svn.internal.sanger.ac.uk/repos/svn/pathsoft/artemis/trunk@8460 ee4ac58c-ac51-4696-9907-e4b3aa274f04

uk/ac/sanger/artemis/chado/FeatureLocLazyQualifierValue.java

@@ -359,6 +359,9 @@ public class FeatureLocLazyQualifierValue implements LazyQualifierValue
     final StringBuffer dbXRefs = new StringBuffer();
     final Collection featureDbXRefs = matchFeature.getFeatureDbXRefs();
     final Iterator it3 = featureDbXRefs.iterator();
+    if(it3 == null)
+      return "";
+    
     while(it3.hasNext())
     {
       DbXRef dbXRef = ((FeatureDbXRef) it3.next()).getDbXRef();