flimflam: Enable -Wimplicit-function-declaration.

plugins/crypto_descbc.c

 /*
  * Encrypt/decrypt plugin using DES-CBC.
  *
  * Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifdef HAVE_CONFIG_H
 #include <config.h>
 #endif
 
 #define CONNMAN_API_SUBJECT_TO_CHANGE
+#include <connman/crypto.h>
+#include <connman/log.h>
+#include <connman/option.h>
 #include <connman/plugin.h>
-#include <connman/crypto.h>
-#include <connman/option.h>
 #include <errno.h>
 #include <glib.h>
 #include <string.h>
 
 #include <rpc/des_crypt.h>
 
 #define BLOCK_SIZE 8
 
 static gboolean initialized = FALSE;
 static char des_key[BLOCK_SIZE];
@@ skipping 212 matching lines @@
 
 static void descbc_finish(void)
 {
         if (initialized)
                 connman_crypto_unregister(&crypto_descbc);
 }
 
 CONNMAN_PLUGIN_DEFINE(crypto_rot47, "DES-CBC Plugin", VERSION,
     CONNMAN_PLUGIN_PRIORITY_DEFAULT, descbc_init,
     descbc_finish)