Method setAppendP

GPRS/ByteVector.h:140–144

Set the Write Position for appends. This is equivalent to setting size().

	// Set the Write Position for appends.  This is equivalent to setting size().
	void setAppendP(size_t bytep, unsigned bitp=0) {
		BVASSERT(bytep + !!bitp <= allocSize());
		mSizeBits = bytep*8 + bitp;
		//mEnd=mStart+bytep; mBitInd=bitp;
	}
	void setSizeBits(size_t bits) {
		BVASSERT((bits+7)/8 <= allocSize());
		mSizeBits = bits;