BGP flow spec RIBin.

Change-Id: I4909bb6e579311a74e25cb44172a2a010faa4e85
diff --git a/protocols/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/flowspec/BgpFlowSpecPrefix.java b/protocols/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/flowspec/BgpFlowSpecPrefix.java
index a394839..8e83404 100755
--- a/protocols/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/flowspec/BgpFlowSpecPrefix.java
+++ b/protocols/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/flowspec/BgpFlowSpecPrefix.java
@@ -41,6 +41,14 @@
      * @param sourcePrefix source prefix
      */
     public BgpFlowSpecPrefix(IpPrefix destinationPrefix, IpPrefix sourcePrefix) {
+        if (destinationPrefix == null) {
+            destinationPrefix = IpPrefix.valueOf(0, 0);
+        }
+
+        if (sourcePrefix == null) {
+            sourcePrefix = IpPrefix.valueOf(0, 0);
+        }
+
         this.destinationPrefix = destinationPrefix;
         this.sourcePrefix = sourcePrefix;
     }