Mesh Saving problem about voxblox

[ZacharyTaylor]

It seems like one of the mesh blocks was not allocated. I am not sure how that could happen though without a bug somewhere in our setup.
I created a branch that will check for this condition https://github.com/ethz-asl/voxblox/tree/fix/nullcheck, could you try switching to it and see if it works, even if it doesn't fix the problem it will give us more debug.

Also just checking, is there a chance that your computer had run out of free ram when the error occurred?

[JiaruiWang-Jill]

I fail to find out the reason but after I re-install voxblox, everything is well now.
Thank you!