- friend gr_skiphead_sptr gr_make_skiphead (size_t itemsize, size_t nitems_to_skip);
- gr_skiphead (size_t itemsize, size_t nitems_to_skip);
+ friend gr_skiphead_sptr gr_make_skiphead (size_t itemsize, uint64_t nitems_to_skip);
+ gr_skiphead (size_t itemsize, uint64_t nitems_to_skip);