Fix memory corruption in tree index during recovery from snapsht.
Fix memory corruption in tree index during recovery from snapsht.

When tree.max_size is 0, tree.max_size * 2 is also 0.

ocelot-inc/tarantool,KlonD90/tarantool,ocelot-inc/tarantool,Sannis/tarantool,guard163/tarantool,guard163/tarantool,nvoron23/tarantool,KlonD90/tarantool,guard163/tarantool,KlonD90/tarantool,condor-the-bird/tarantool,vasilenkomike/tarantool,condor-the-bird/tarantool,ocelot-inc/tarantool,rtsisyk/tarantool,condor-the-bird/tarantool,nvoron23/tarantool,dkorolev/tarantool,dkorolev/tarantool,KlonD90/tarantool,dkorolev/tarantool,nvoron23/tarantool,KlonD90/tarantool,nvoron23/tarantool,mejedi/tarantool,Sannis/tarantool,vasilenkomike/tarantool,dkorolev/tarantool,condor-the-bird/tarantool,Sannis/tarantool,mejedi/tarantool,condor-the-bird/tarantool,Sannis/tarantool,guard163/tarantool,mejedi/tarantool,nvoron23/tarantool,guard163/tarantool,vasilenkomike/tarantool,Sannis/tarantool,rtsisyk/tarantool,rtsisyk/tarantool,vasilenkomike/tarantool,vasilenkomike/tarantool,mejedi/tarantool,dkorolev/tarantool,nvoron23/tarantool,ocelot-inc/tarantool,rtsisyk/tarantool