接收点云的代码中对blind的处理有误

[PanNeng-ZJU]

src/pointcloud_preprocess.cc文件的第62行处：

            if ((abs(cloud_full_[i].x - cloud_full_[i - 1].x) > 1e-7) ||
                (abs(cloud_full_[i].y - cloud_full_[i - 1].y) > 1e-7) ||
                (abs(cloud_full_[i].z - cloud_full_[i - 1].z) > 1e-7) &&
                    (cloud_full_[i].x * cloud_full_[i].x + cloud_full_[i].y * cloud_full_[i].y +
                         cloud_full_[i].z * cloud_full_[i].z >
                     (blind_ * blind_))) {
                is_valid_pt[i] = true;
            }

if语句的前三个条件缺少一个括号，导致第四个条件（blind）不起作用，正确的应为：

            if (((abs(cloud_full_[i].x - cloud_full_[i - 1].x) > 1e-7) ||
                (abs(cloud_full_[i].y - cloud_full_[i - 1].y) > 1e-7) ||
                (abs(cloud_full_[i].z - cloud_full_[i - 1].z) > 1e-7)) &&
                    (cloud_full_[i].x * cloud_full_[i].x + cloud_full_[i].y * cloud_full_[i].y +
                         cloud_full_[i].z * cloud_full_[i].z >
                     (blind_ * blind_))) {
                is_valid_pt[i] = true;
            }