Fix of the jsonToBinUtility

[Corentin-Allaire]

Fix an issue with the jsonToBinUtility. The bin the the json file can be 3 or 4 elements depending on if we read a geometry map or a material map.
The old code was causing segfault within athena, that issue will be solve by this PR.

[codecov]

Codecov Report

Merging #346 into master will not change coverage.
The diff coverage is n/a.

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  Files         325      325           
  Lines       16356    16356           
  Branches     7588     7588           
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  Hits         7945     7945           
  Misses       3101     3101           
  Partials     5310     5310           

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[asalzburger]

Ok, looks like we need to build 0.30.00 for Athena then.

[Corentin-Allaire]

Ok, looks like we need to build 0.30.00 for Athena then.

It would be cleaner but for now I can go around the issue by modifying the json file used as input for the mapping. I just need to add a fourth elements to the bin object, something like that :
"bin0": [
"binPhi",
"closed",
24,
[0,0] <----- Added to the input json file for surface/volume mapped onto
],