sophia: fix page size calculation
sophia: fix page size calculation

clibs/sophia,mneumann/sophia,perint/sophia,tarantool/sophia,clibs/sophia,Bitcoinsulting/sophia,perint/sophia,mneumann/sophia,Bitcoinsulting/sophia,tarantool/sophia,clibs/sophia,mneumann/sophia,mknight-tag/sophia,perint/sophia,mknight-tag/sophia,Bitcoinsulting/sophia,tarantool/sophia,mknight-tag/sophia