LogEntry.h: init LogEntry::prio in constructor

CID 1240202 (#1 of 1): Uninitialized scalar field (UNINIT_CTOR)
 uninit_member: Non-static class member prio is not initialized
 in this constructor nor in any functions that it calls.

Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>
SyntheticClient.cc: remove dead code

Fix for coverity issue:

const: At condition unsafe > 0, the value of unsafe must be equal to 0.
dead_error_condition: The condition unsafe > 0 cannot be true.

CID 716892 (#1 of 1): Logically dead code (DEADCODE)
dead_error_begin: Execution cannot reach this statement

Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>
client/SyntheticClient.cc: remove dead code

Fix for:

const: At condition do_sync, the value of do_sync must be equal to 0.
dead_error_condition: The condition do_sync cannot be true.
CID 716893 (#1 of 1): Logically dead code (DEADCODE)
dead_error_begin: Execution cannot reach this statement op.OSDOp()

Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>
test_librbd.cc: fix compiler warning

Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>
Merge pull request #2618 from ceph/wip-coverity-20141001

Fixes for Coverity issues

Reviewed-by: Sage Weil <sage@redhat.com>