Fix overflow issue

[mentoc3000]

Describe your changes

When assigning pointers to labelArray, if the file had a final, empty newline, the last element of labelArray would try to be assigned to a pointer to labelsData + labelsFileSize + 1, which can cause a warning that can disrupt inference:

malloc(): invalid size (unsorted)

I also removed the replacement of the final '\n' with '\0' because it is always done in the loop.

Checklist before requesting a review

• [X] I have performed a self-review of my own code
• [X] I have verified that the code builds perfectly fine on my local system
• [ ] I have added tests that prove my fix is effective or that my feature works
• [X] I have commented my code, particularly in hard-to-understand areas
• [X] I have verified that my code follows the style already available in the repository
• [X] I have made corresponding changes to the documentation

[pataxis]

Thank you @mentoc3000 for your contribution, it's very appreciated!