Fix odd bitlength RSA key generation

Fix issue that caused a hang up when generating RSA keys of odd
bitlength.
diff --git a/ChangeLog b/ChangeLog
index 007f604..9bf0b15 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -16,6 +16,7 @@
      in the trusted certificate list.
    * Fix bug in mbedtls_x509_crt_parse that caused trailing extra data in the 
      buffer after DER certificates to be included in the raw representation.
+   * Fix issue that caused a hang up when generating RSA keys of odd bitlength
 
 Changes
    * On ARM platforms, when compiling with -O0 with GCC, Clang or armcc5,