virSecuritySELinuxContextListFree: Don't leak list->items

This array is allocated in virSecuritySELinuxContextListAppend()
but never freed. This commit is essentially the same as ca25026.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>

src/security/security_selinux.c

@@ -156,6 +156,7 @@ virSecuritySELinuxContextListFree(void *opaque)
     for (i = 0; i < list->nItems; i++)
         virSecuritySELinuxContextItemFree(list->items[i]);
 
+    VIR_FREE(list->items);
     VIR_FREE(list);
 }