Hotfix #2526, add missing memset() for stack variables

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[x] I reviewed the Contributing Guide.
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Describe the contribution Correct two cases where struct variables on the stack were not being properly cleared before use.

Hot Fix for PR #2526 - addresses issues when running workflows

Testing performed Run workflows

Expected behavior changes Workflows succeed, no seg faults

System(s) tested on Github Hosted Runner

Contributor Info - All information REQUIRED for consideration of pull request Joseph Hickey, Vantage Systems, Inc.

nasa / cFE