call mu_error() instead of error().

@@ -70,11 +70,11 @@ xalloc_die (void)
 {
   if (xalloc_fail_func)
     (*xalloc_fail_func) ();
-  error (xalloc_exit_failure, 0, "%s", _(xalloc_msg_memory_exhausted));
+  mu_error ("%s", _(xalloc_msg_memory_exhausted));
   /* The `noreturn' cannot be given to error, since it may return if
      its first argument is 0.  To help compilers understand the
      xalloc_die does terminate, call exit. */
-  exit (EXIT_FAILURE);
+  exit (xalloc_exit_failure);
 }
 
 /* Allocate N bytes of memory dynamically, with error checking.  */