pk: Return -ENOSPC for writes past the end of the disk
pk: Return -ENOSPC for writes past the end of the disk

- Return -ENOSPC instead of 0 when the application tries to write past
the end of the disk image file

cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr