[Misc] Explicitly cast indices to int32 in snode_deactivate to preven…

[bluevisor]

Summary

This PR addresses a Taichi warning in _kernels.py that occurs during implicit casting in the snode_deactivate function. The warning was as follows:

TaichiWarning: Field index not int32, casting into int32 implicitly

Changes Made

• Updated snode_deactivate to explicitly cast each element in I to int32 before calling deactivate, which suppresses the implicit casting warning.

Rationale

Explicitly casting to int32 prevents the warning and ensures that the code adheres to expected data types.

Testing

• Verified that the warning no longer appears when running code that triggers snode_deactivate.
• Confirmed that snode_deactivate still functions as expected post-update.

[feisuzhu]

/rebase

[hughperkins]

/rebase