LU-4285 kernel: fix uninitialized access of quota got[] array

LU-4285 kernel: fix uninitialized access of quota got[] array

The pointer maybe uninitialized when dqput be called.

Signed-off-by: yang sheng <yang.sheng@intel.com>
Change-Id: I94c138664c2f0a2404f2dafda25f3ee968a981fb
Reviewed-on: http://review.whamcloud.com/8418
Tested-by: Jenkins
Reviewed-by: Niu Yawei <yawei.niu@intel.com>
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: James Simmons <uja.ornl@gmail.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>