Fix #1667 Potential crash for the OpenMP multi-thread running.

[lcheng9]

Proposed Changes

Initialize the omp_partitions vector with the number of points, skip the for loop if the last partition has been calculated. A light-weight checker is added also to verify the partition vector, promote a warning or error message if necessary.

Related Work

Fix #1667 Potential crash for the OpenMP multi-thread running.

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• I have added a test case that demonstrates my contribution, if necessary.
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[pcarruscag]

Thank you for opening a PR, please add yourself to AUTHORS.md (note that it is in a funny alphabetical order with upper case before lower case)

[lcheng9]

Thanks for the approval. I will update the AUTHORS.md next time together with other changes.