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 017d6a2..38a13e0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -9,6 +9,7 @@
    * Fix issue in Makefile that prevented building using armar. #386
    * 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,