JAL-1919 JAL-2177 handle empty pdbentries list correctly

diff --git a/src/jalview/appletgui/APopupMenu.java b/src/jalview/appletgui/APopupMenu.java
index c30fdad..2037ca0 100644 (file)
--- a/src/jalview/appletgui/APopupMenu.java
+++ b/src/jalview/appletgui/APopupMenu.java
@@ -892,9 +892,10 @@ public class APopupMenu extends java.awt.PopupMenu implements
 
   void addPDB()
   {
-    if (seq.getAllPDBEntries() != null)
+    Vector<PDBEntry> pdbs = seq.getAllPDBEntries();
+    if (pdbs != null&& !pdbs.isEmpty())
     {
-      PDBEntry entry = seq.getAllPDBEntries().firstElement();
+      PDBEntry entry = pdbs.firstElement();
 
       if (ap.av.applet.jmolAvailable)
       {