Fix handling of non-fatal alerts

fixes #308
diff --git a/ChangeLog b/ChangeLog
index 5ebd748..448c8cf 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -2,14 +2,17 @@
 
 = mbed TLS 2.1.3 released 2015-10-xx
 
-Changes
-   * Improved performance of mbedtls_ecp_muladd() when one of the scalars is 1
-     or -1.
 Bugfix
    * Fix build error with configurations where ECDHE-PSK is the only key
      exchange. Found and fix provided by Chris Hammond. #270
    * Fix build error with configurations where RSA, RSA-PSK, ECDH-RSA or
      ECHD-ECDSA if the only key exchange. Multiple reports. #310
+   * Fix bug causing some handshakes to fail due to some non-fatal alerts not
+     begin properly ignored. Found by Kasom Koht-arsa, #308
+
+Changes
+   * Improved performance of mbedtls_ecp_muladd() when one of the scalars is 1
+     or -1.
 
 = mbed TLS 2.1.2 released 2015-10-06