Fix for bug #13501 "build problem: too many arguments to function my_bool

acl_init".

Updated calls to acl_init()/grant_init() in init_embedded_server() - their
signatures were changed recently, now they don't need argument for passing
pointer to THD object (this code was only compiled if one built embedded
server library with --with-embedded-privilege-control switch).

libmysqld/lib_sql.cc

@@ -427,9 +427,9 @@ int init_embedded_server(int argc, char **argv, char **groups)
 
   acl_error= 0;
 #ifndef NO_EMBEDDED_ACCESS_CHECKS
-  if (!(acl_error= acl_init((THD *)0, opt_noacl)) &&
+  if (!(acl_error= acl_init(opt_noacl)) &&
       !opt_noacl)
-    (void) grant_init((THD *)0);
+    (void) grant_init();
 #endif
   if (acl_error || my_tz_init((THD *)0, default_tz_name, opt_bootstrap))
   {