LU-3572 mgs: build failure seen in SLES SP2 server build

Fix uninitialized variable error introduced into SLES11 SP2 server
builds by a recent commit.

Signed-off-by: Bob Glossman <bob.glossman@intel.com>
Change-Id: I2d302fae77f7ea6f802f5dded570cbbb01d0e13a
Reviewed-on: http://review.whamcloud.com/6937
Reviewed-by: Keith Mannthey <keith.mannthey@intel.com>
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>