fix null pointer exception for sources which don't have any additional properties

diff --git a/src/jalview/ws/seqfetcher/DbSourceProxyImpl.java b/src/jalview/ws/seqfetcher/DbSourceProxyImpl.java
index 10aaf7d..e3f5664 100644 (file)
--- a/src/jalview/ws/seqfetcher/DbSourceProxyImpl.java
+++ b/src/jalview/ws/seqfetcher/DbSourceProxyImpl.java
@@ -47,6 +47,10 @@ public abstract class DbSourceProxyImpl implements DbSourceProxy
    */\r
   public Hashtable getDbSourceProperties()\r
   {\r
+    if (props==null)\r
+    {\r
+      props = new Hashtable();\r
+    }\r
     return props;\r
   }\r
 \r