sstable: fix TOC size check
sstable: fix TOC size check

Make sure we detect a too-large TOC correctly.

phonkee/scylla,asias/scylla,linearregression/scylla,glommer/scylla,shaunstanislaus/scylla,rentongzhang/scylla,linearregression/scylla,phonkee/scylla,acbellini/scylla,acbellini/scylla,asias/scylla,guiquanz/scylla,victorbriz/scylla,raphaelsc/scylla,stamhe/scylla,kjniemi/scylla,scylladb/scylla,kangkot/scylla,rentongzhang/scylla,tempbottle/scylla,scylladb/scylla,rluta/scylla,senseb/scylla,raphaelsc/scylla,capturePointer/scylla,bowlofstew/scylla,senseb/scylla,bowlofstew/scylla,rentongzhang/scylla,dwdm/scylla,eklitzke/scylla,kangkot/scylla,justintung/scylla,senseb/scylla,shaunstanislaus/scylla,gwicke/scylla,glommer/scylla,asias/scylla,avikivity/scylla,avikivity/scylla,phonkee/scylla,rluta/scylla,capturePointer/scylla,wildinto/scylla,rluta/scylla,eklitzke/scylla,acbellini/scylla,dwdm/scylla,duarten/scylla,scylladb/scylla,guiquanz/scylla,tempbottle/scylla,stamhe/scylla,respu/scylla,linearregression/scylla,capturePointer/scylla,respu/scylla,dwdm/scylla,gwicke/scylla,bowlofstew/scylla,gwicke/scylla,aruanruan/scylla,raphaelsc/scylla,glommer/scylla,shaunstanislaus/scylla,stamhe/scylla,respu/scylla,guiquanz/scylla,aruanruan/scylla,victorbriz/scylla,justintung/scylla,kjniemi/scylla,aruanruan/scylla,kangkot/scylla,duarten/scylla,wildinto/scylla,scylladb/scylla,victorbriz/scylla,avikivity/scylla,tempbottle/scylla,justintung/scylla,eklitzke/scylla,duarten/scylla,kjniemi/scylla,wildinto/scylla