Sonar suggestion - null pointer check had the wrong boolean operator

Change-Id: I7db12414f4c04694067c69d7a949d10ae740efbd
diff --git a/apps/netconf/client/src/main/java/org/onosproject/netconf/client/impl/NetconfTranslatorImpl.java b/apps/netconf/client/src/main/java/org/onosproject/netconf/client/impl/NetconfTranslatorImpl.java
index b2c2161..c563204 100644
--- a/apps/netconf/client/src/main/java/org/onosproject/netconf/client/impl/NetconfTranslatorImpl.java
+++ b/apps/netconf/client/src/main/java/org/onosproject/netconf/client/impl/NetconfTranslatorImpl.java
@@ -312,7 +312,7 @@
         }
 
         if (dbr instanceof LeafNode.Builder &&
-                (nodes != null || !nodes.isEmpty())) {
+                (nodes != null && !nodes.isEmpty())) {
             //exception "leaf/leaf-list can not have child node"
         }