Method should return when error occurs, otherwise there will be NullPointerException

Change-Id: I6b597ec997ebb2f243f66864c58bab8d812ea0d8
diff --git a/apps/pce/pceweb/src/main/java/org/onosproject/pceweb/PceWebTopovMessageHandler.java b/apps/pce/pceweb/src/main/java/org/onosproject/pceweb/PceWebTopovMessageHandler.java
index f5b1419..95c113c 100644
--- a/apps/pce/pceweb/src/main/java/org/onosproject/pceweb/PceWebTopovMessageHandler.java
+++ b/apps/pce/pceweb/src/main/java/org/onosproject/pceweb/PceWebTopovMessageHandler.java
@@ -223,6 +223,7 @@
 
             if (lspType == null || lspType.equals(STRING_NULL)) {
                 log.error("PCE setup path is failed as LSP type is mandatory");
+                return;
             }
 
             if ((src != null) && (dst != null)) {