cmocka: eq_iir and eq_fir: Fix test crash

[jsarha]

Assign mod->stream_params to NULL aftere it is freed. If this is not done comp_free() tries to free it again couple of lines later, when it calls module_adapter_free(). Removing test_free(mod->stream_params) does not fix the issue because cmocka framework provided test_alloc() and test_free() are not equivalent to malloc() and free().

[Copilot]

Pull Request Overview

This PR fixes a test crash in cmocka tests for eq_iir and eq_fir modules by preventing double-free errors. The issue occurs when comp_free() attempts to free mod->stream_params after it has already been freed in the teardown function.

• Set mod->stream_params to NULL after freeing it in teardown functions
• Prevent double-free crashes when comp_free() calls module_adapter_free()

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
test/cmocka/src/audio/eq_iir/eq_iir_process.c	Adds NULL assignment after freeing stream_params to prevent double-free
test/cmocka/src/audio/eq_fir/eq_fir_process.c	Adds NULL assignment after freeing stream_params to prevent double-free

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[kv2019i]

Good catch @jsarha !