Fixed an array out-of-bounds issue caused by bubbling sort writing error

[fly1ngpengu1ns]

在原本的代码中，当循环至j=9时，将访问到buf[10]，但是在1063行对buf的定义：uint16_t buf[10];中得知访问buf[10]是一个数组越界访问行为，严重的话将会导致栈溢出漏洞。 而产生这个问题的原因在于，原本的冒泡排序的边界条件书写错误，将原本的错误条件：

for(i=0; i<10; i++){
    for(j=0; j<10; j++){
        // the code to swap
    }
}

更正为正确条件：

for(i=0; i<9; i++){
    for(j=0; j<9-i; j++){
        // the code to swap
    }
}

从而解决了这个问题

[tencent-adm]

Thank you for your submission, we really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[fly1ngpengu1ns]

recheck

[Supowang1989]

收到，这个是沁恒芯片的驱动代码，我跟对方工程师确定一下