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