Migrated sql_plugin_t to INIT/METHOD macros

src/libcharon/plugins/sql/sql_plugin.c

@@ -53,10 +53,8 @@ struct private_sql_plugin_t {
 	sql_logger_t *logger;
 };
 
-/**
- * Implementation of plugin_t.destroy
- */
-static void destroy(private_sql_plugin_t *this)
+METHOD(plugin_t, destroy, void,
+	private_sql_plugin_t *this)
 {
 	charon->backends->remove_backend(charon->backends, &this->config->backend);
 	lib->credmgr->remove_set(lib->credmgr, &this->cred->set);
@@ -83,11 +81,15 @@ plugin_t *sql_plugin_create()
 		return NULL;
 	}
 
-	this = malloc_thing(private_sql_plugin_t);
+	INIT(this,
+		.public = {
+			.plugin = {
+				.destroy = _destroy,
+			},
+		},
+		.db = lib->db->create(lib->db, uri),
+	);
 
-	this->public.plugin.destroy = (void(*)(plugin_t*))destroy;
-
-	this->db = lib->db->create(lib->db, uri);
 	if (!this->db)
 	{
 		DBG1(DBG_CFG, "sql plugin failed to connect to database");