Downsampling magic numbers

[KacperSynator]

There are two magic numbers in downsampling section in calibration.cpp.

First one is used as kLeafSize:

CalibAnything/src/calibration.cpp

Line 106 in 4122ea1

float kLeafSize = 0.1;

which from my understanding should be a down_sample:voxel_m config parameter as it is not used anywhere. I created the PR which fixes it: #24

Second one`:

CalibAnything/src/calibration.cpp

Line 111 in 4122ea1

pcl::octree::OctreePointCloud<pcl::PointXYZI> octree{1250 * kLeafSize};

I don't understand what this magic number means. If anybody knows what it means and if this should be the constant or parameter please let me know.