fix: logic in mm_assigdirectlib to close #375

[allanbowe]

Issue

375

Intent

enable open passthrough to take place

Implementation

added logic to ensure that the macro is not prematurely exited

Checks

• [x] Code is formatted correctly (sasjs lint).
• [x] Any new functionality has been unit tested.
• [x] All unit tests are passing (sasjs test).
• [x] The PR desc or underlying commits follow the Conventional Commit standard

[github-actions[bot]]

:tada: This PR is included in version 4.52.5 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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