LU-5188 osp: Correctly check for invalid setattr record

Patch for LU-4345 (commit 80f90fcde73e2faff8b7b0ffc7c19bc52982e027 )
has a correct comment about lsr_valid member being either 0 or
having UID and GID fields set, but the check has a typo causing
it to check for lsr_valid to be both 0 and have the bits set which
is impossible.

Change-Id: I32e6f261b4707391d6e96f8434aae7bf8f55bf8e
Signed-off-by: Oleg Drokin <oleg.drokin@intel.com>