v0.3.3

Fixed

• sn_vm_get_page_size() narrowed the sysconf result with SN_MAX(0, ps), which
  turned the documented -1 error return into a page size of zero instead of
  reporting it. Every caller then passed a length of zero: mprotect with a length
  of zero succeeds and protects nothing, and munmap rejects it with EINVAL, so a
  released range could stay mapped. SN_ASSERT is compiled out in release, so it
  did not catch this either. The result is now checked before it is narrowed, and
  a failed query falls back to the smallest page size these platforms use