Check for BitVector capacity overflow
Check for BitVector capacity overflow

The actual capacity of a BitVector is rounded up to the next multiple
of eight, so capacity must not be larger than (SIZE_MAX - 7).

apache/lucy,apache/lucy,nwellnhof/lucy,nwellnhof/lucy,nwellnhof/lucy,nwellnhof/lucy,apache/lucy,apache/lucy,apache/lucy,nwellnhof/lucy,apache/lucy,nwellnhof/lucy,apache/lucy,nwellnhof/lucy