Ticket #48048 - Fix coverity issues - 2015/2/24
Coverity defect 13078 - Explicit null dereferenced (FORWARD_NULL)
Description: Added NULL check for conn. If NULL, let sync_send_
results abort there. Also, added "return" if sync_acquire_connection
returns non success as advertised as "aborted" in the error message.
modified: sync_send_results in plugins/sync/sync_persist.c