vmdk: relative_path: use pstrcpy in place of strncpy

Avoid strncpy+manual-NUL-terminate.  Use pstrcpy instead.

Acked-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Jim Meyering <meyering@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

block/vmdk.c

diff --git a/block/vmdk.c b/block/vmdk.c
index f2e861b..1a80e5a 100644
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -1408,8 +1408,7 @@
         return -1;
     }
     if (path_is_absolute(target)) {
-        dest[dest_size - 1] = '\0';
-        strncpy(dest, target, dest_size - 1);
+        pstrcpy(dest, dest_size, target);
         return 0;
     }
     while (base[i] == target[i]) {