read: Set destructor of binary coded box properly.
read: Set destructor of binary coded box properly.

This fix a memory leak.

maki-rxrz/L-SMASH,l-smash/l-smash,canbal/l-smash,mstorsjo/l-smash,silverfilain/L-SMASH,silverfilain/L-SMASH,dwbuiten/l-smash,dwbuiten/l-smash,l-smash/l-smash,canbal/l-smash,mstorsjo/l-smash,l-smash/l-smash,maki-rxrz/L-SMASH,silverfilain/L-SMASH