CHUNK_ID_XYZI voxel bounds check to improve handling of corrupt files #59
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I've encountered a number of vox files which were corrupt with voxels outside the bounds of the model size. This results in the voxel array bounds being overwritten when loaded.
There's already an assert in the code, but this PR adds the same test to adding the voxel data to the array. I've been able to recover some data from models which otherwise would not load with this addition and I don't think the performance hit is significant.