Fix #21, Add MM_SegmentBreak() to MM_FillMem()

[thnkslprpt]

Checklist

• I reviewed the Contributing Guide.
• I signed and emailed the appropriate Contributor License Agreement to GSFC-SoftwareRelease@mail.nasa.gov and copied cfs-program@lists.nasa.gov.

Describe the contribution

• Fixes MM_FillMem doesn't call MM_SegmentBreak like read from or write to file #21
  • Added call to MM_SegmentBreak() between segments in MM_FillMem().

Testing performed
CI Run + Build & Unit Tests still passing successfully.

Expected behavior changes
Removes this source of potential CPU hogging.

Contributor Info
Avi Weiss @thnkslprpt