Problem with memoryleak in octstr

Hi,

I'm trying to figure out why the following octstr function leak 1 byte 
of memory for each iteration:

/* test_octstr.c */

#include <unistd.h>
#include "gwlib/gwlib.h"

int main(void) {
  Octstr *os;
  int i;

  gwlib_init();

  for (i = 0; i < 100; i++) {
    os = octstr_format("sadfasdfasdfas");
    octstr_append(os, octstr_imm("asdfasdfasdfasdf"));
    octstr_destroy(os);
    gwthread_sleep(1);
  }

  gwlib_shutdown();
 
  return 0;
}

Watching this with "ps -C test_octstr -F" shows that for every four 
seconds it leaks 4 bytes... Is the use of octstr incorrect or is it a 
problem in gwlib ?

With regards,
-Ken.