SCRUTINICE fixes

[smittals2]

Issues:

Resolves #ISSUE-NUMBER1
Addresses #ISSUE-NUMBER2

Description of changes:

Scrutinice alerts for a null check and potential memory leak

Call-outs:

Point out areas that need special attention or support during the review process. Discuss architecture or design changes.

Testing:

How is this change tested (unit tests, fuzz tests, etc.)? Are there any testing steps to be verified by the reviewer?

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license and the ISC license.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 66.66667% with 2 lines in your changes missing coverage. Please review.

Project coverage is 79.01%. Comparing base (7b39332) to head (0a16794).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
crypto/fipsmodule/pqdsa/pqdsa.c	60.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2180      +/-   ##
==========================================
+ Coverage   78.96%   79.01%   +0.05%     
==========================================
  Files         611      612       +1     
  Lines      105878   106074     +196     
  Branches    14984    14994      +10     
==========================================
+ Hits        83602    83818     +216     
+ Misses      21624    21603      -21     
- Partials      652      653       +1     

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