Fix null pointer dereference in nvMemoryPool_free

[prjanitor]

Summary

The nvMemoryPool_free function did not check if the pool pointer was null before accessing pool->pool and freeing the pool structure. This could cause a null pointer dereference crash when the function is called with a null pointer.

Changes

• Added null check at the beginning of nvMemoryPool_free function
• Returns early if pool is null, preventing null pointer dereference

Testing

The fix follows the same pattern used in other similar functions in the codebase (e.g., nvArray_free in src/core/array.c).

Related

Fixes bug #639: Missing null check in nvMemoryPool_free before accessing pool members

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[codacy-production]

Up to standards ✅

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