init: Initialize uuid pointer

dm_ioctl_export function checks if uuid is NULL if not uses it to extract
uuid cell information and could result to accessing uninitialized pointer.

Change-Id: I88304b157efe03a1ed6eee0eaf04bfe0953646e5
Signed-off-by: Channagoud Kadabi <ckadabi@codeaurora.org>
1 file changed