LU-16518 lod: fix new clang error in lod_lov.c

LU-16518 lod: fix new clang error in lod_lov.c

The variable hsmsize was uninitialized in some
situations. By moving the initialization earlier,
we can avoid this.

Fixes: aebb405e32e ("LU-10499 pcc: use foreign layout for PCCRO")
Signed-off-by: Timothy Day <timday@amazon.com>
Change-Id: I3385e3349ad00d037b8b94337cb3352623d0a40a
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/52566
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Reviewed-by: Qian Yingjin <qian@ddn.com>
Reviewed-by: Arshad Hussain <arshad.hussain@aeoncomputing.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>