Merge branch 'hotfix/issue-229'
Return a proper value

redis_sock_read_multibulk_reply_zipped_with_flag should always return
a value.  We merged in a change that handled a certain error condition
that was using RETURN_FALSE (and therefore not returning a value)

Simply changed this to RETVAL_FALSE and return -1;
Merge branch 'hotfix/add_retval_zipped_wreply' into develop