dog: memory leak in vdi_object_map

In function vdi_object_map, the pointer 'inode' is allocated via
xmalloc, but its memory is not released when returns.

Signed-off-by: Meng An <anmeng.an@alibaba-inc.com>
Signed-off-by: Hitoshi Mitake <mitake.hitoshi@lab.ntt.co.jp>
dog: memory leak in vdi_setattr

In function vdi_setattr, the pointer 'value' is allocated via
xmalloc, but its memory is not released when returns.

[Hitoshi: added initialization of the local variable "value" of
vdi_setattr()]

Signed-off-by: Meng An <anmeng.an@alibaba-inc.com>
Signed-off-by: Hitoshi Mitake <mitake.hitoshi@lab.ntt.co.jp>