storage/maria/ma_pagecache.c:
  pagecache->blocks is now long, takes 8 bytes on some platforms.
  The cast to ulonglong in int8store is for those platforms where
  ulong is 32-bit and int8store uses some << shifts, if there are
  (x<<40 is undefined if x is 32-bit).
storage/maria/ma_recovery.c:
  this change corresponds to the one done in ma_pagecache.c: number
  of dirty pages is stored in 8 bytes.