mysql plugin: remove unneccesary cast

diff --git a/src/mysql.c b/src/mysql.c
index 9b8d6cf..8ab775f 100644 (file)
--- a/src/mysql.c
+++ b/src/mysql.c
@@ -71,7 +71,7 @@ static void mysql_database_free (void *arg) /* {{{ */
 
        DEBUG ("mysql plugin: mysql_database_free (arg = %p);", arg);
 
-       db = (mysql_database_t *) arg;
+       db = arg;
 
        if (db == NULL)
                return;