Fix warnings for libnl1.
diff --git a/agent/mibgroup/mibII/tcpTable.c b/agent/mibgroup/mibII/tcpTable.c
index 9f6889f..c9c9dd8 100644
--- a/agent/mibgroup/mibII/tcpTable.c
+++ b/agent/mibgroup/mibII/tcpTable.c
@@ -572,12 +572,12 @@
 
 #define nl_geterror(e) nl_geterror_compat(e)
 
-static struct nl_socket *nl_socket_alloc(void)
+static struct nl_handle *nl_socket_alloc(void)
 {
     return nl_handle_alloc();
 }
 
-static void nl_socket_free(struct nl_socket *ns)
+static void nl_socket_free(struct nl_handle *ns)
 {
     nl_handle_destroy(ns);
 }