Fixing null-create-device to allow no lat/long.

Change-Id: Id0d221a13f6e410fb8ea0e7aee6ede870c3fe05d
diff --git a/providers/null/src/main/java/org/onosproject/provider/nil/cli/CreateNullDevice.java b/providers/null/src/main/java/org/onosproject/provider/nil/cli/CreateNullDevice.java
index 86b12f0..ef8bbcd 100644
--- a/providers/null/src/main/java/org/onosproject/provider/nil/cli/CreateNullDevice.java
+++ b/providers/null/src/main/java/org/onosproject/provider/nil/cli/CreateNullDevice.java
@@ -68,8 +68,10 @@
         DeviceId deviceId = sim.nextDeviceId();
         BasicDeviceConfig cfg = cfgService.addConfig(deviceId, BasicDeviceConfig.class);
         cfg.name(name);
-        cfg.latitude(latitude);
-        cfg.longitude(longitude);
+        if (latitude != 0 && longitude != 0) {
+            cfg.latitude(latitude);
+            cfg.longitude(longitude);
+        }
         cfg.apply();
 
         sim.createDevice(deviceId, name, Device.Type.valueOf(type.toUpperCase()), portCount);