scsi-generic: correct usage of memset() (Laurent Vivier)

scsi-generic: correct usage of memset() (Laurent Vivier)

      void *memset(void *s, int c, size_t n);

DESCRIPTION
       The  memset()  function  fills  the  first  n  bytes of the
memory area
       pointed to by s with the constant byte c."

Reported by Dietmar Maurer.

Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5291 c046a42c-6fe2-441c-8c8c-71466251a162