fix CLStream memcpy read 1 extra byte

[xiaokang]

It should only copy the length passed from argument, instead of length + 1, which may cause ASAN global-buffer-overflow.

    void init(const void *_value, int32_t _length, bool copyData = true) override {
        const size_t length = _length;
        this->pos = 0;
        if (copyData) {
            T *tmp = (T *) this->value;
            if (tmp == NULL || !this->ownValue) {
                tmp = _CL_NEWARRAY(T, length + 1);
                this->buffer_size = length;
            } else if (length > this->buffer_size || length < (this->buffer_size / 2)) {//expand, or shrink
                tmp = (T *) realloc(tmp, sizeof(T) * (length + 1));
                this->buffer_size = length;
            }
            memcpy(tmp, _value, length + 1);  ///////////////// THIS IS THE BUGGY LINE  //////////
            this->value = tmp;
        } else {
            if (ownValue && this->value != NULL) {
                _CLDELETE_LARRAY((T *) this->value);
            }
            this->value = (T *)_value;
            this->buffer_size = 0;
        }
        this->m_size = length;
        this->ownValue = copyData;
    };