avro

AVRO-968. C: avro_value_cmp now compares string values correctly

Before, we weren't extracting the contents of string values in
avro_value_cmp and avro_value_cmp_fast, so you'd get a garbage result.
Contributed by Vivek Nadkarni.


git-svn-id: https://svn.apache.org/repos/asf/avro/trunk@1213898 13f79535-47bb-0310-9956-ffa450edef68