ipsec: fix typo

Change-Id: I04c59bbe1780e7289cb27a0a912803812fdc297e
Signed-off-by: Klement Sekera <ksekera@cisco.com>
diff --git a/src/vnet/ipsec/esp_encrypt.c b/src/vnet/ipsec/esp_encrypt.c
index 7b7d2f3..8edd565 100644
--- a/src/vnet/ipsec/esp_encrypt.c
+++ b/src/vnet/ipsec/esp_encrypt.c
@@ -145,7 +145,7 @@
 	vlib_node_increment_counter (vm, esp4_encrypt_node.index,
 				     ESP_ENCRYPT_ERROR_NO_BUFFER,
 				     n_left_from);
-      clib_warning ("no enough empty buffers. discarding frame");
+      clib_warning ("not enough empty buffers. discarding frame");
       goto free_buffers_and_exit;
     }