Fixed memory leak in benchmark application

ChangeLog

diff --git a/ChangeLog b/ChangeLog
index 9390243..6c0a5c5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -22,6 +22,7 @@
    * Missing defines / cases for RSA_PSK key exchange
    * crypt_and_hash app checks MAC before final decryption
    * Potential memory leak in ssl_ticket_keys_init()
+   * Memory leak in benchmark application
 
 = PolarSSL 1.3.2 released on 2013-11-04
 Features