if (lines <= 0)
if (--lines <= 0)
	public void deleteLines(int lineIndex, int lines)	{		if (lines <= 0)			return;		int lastIndex = Math.max(length,(lineIndex - 1) + lines);		length = length - lines;		System.arraycopy(lineInfo,lineIndex + lines,lineInfo,lineIndex,			lastIndex - lineIndex);	}