void SetBitOn(unsigned int bit)
The SetBitOn method sets the bit at the specified bit position/index
of an OEBitVector. Bit position indices are numbered from zero, and
have a maximum of OEBitVector::GetSize()-1. If the value of 'bit' is
greater than or equal to OEBitVector::GetSize(), the bitmap is resized
to bit+1 bits. All of the new bits other than the one specified in
the argument, i.e. the last, are initialized to zero.