lldp: Fix Coverity Warnings CID 177942, CID 177945

Change-Id: Ic1ab32c5df3f7a613fe0dcd6bfc15037fa2a008b
Signed-off-by: Dave Wallace <dwallacelf@gmail.com>
diff --git a/src/vnet/lldp/lldp_cli.c b/src/vnet/lldp/lldp_cli.c
index 239a7ab..8bedfcf 100644
--- a/src/vnet/lldp/lldp_cli.c
+++ b/src/vnet/lldp/lldp_cli.c
@@ -95,7 +95,7 @@
       if (mgmt_oid && *mgmt_oid)
 	{
 	  n->mgmt_oid = *mgmt_oid;
-	  *mgmt_ip6 = NULL;
+	  *mgmt_oid = NULL;
 	}
 
       const vnet_sw_interface_t *sw =