Too much bounds checking

Currently bounds checking is done in the bbWrap function in blueberry-transcoder.c

This is called in getBbUint8, setBbUint8 and setBbBool

These are then called multiple times in the multi-byte word accessors.

This is super wasteful. It would be better to check prior to the top-level accessor and then call a lower level non-checked byte accessor.

Start in blueberry-transcoder.c with bbWrap, getBbUint8, setBbUint8, and setBbBool, then trace how the multi-byte word accessors call them. Move bounds checking to the top-level accessor path and use a lower-level non-checked byte accessor so each operation is checked only once.

Written by the indexing model from the issue text.