update (passive_anticheat): Case Switch to If

[acidmanifesto]

Changes proposed:

• Code reduction
• remove case swith and replace it with a if statement that ensures check on transports.

Target branch(es): 335-passive_anticheat

Issues addressed: Fixes #

Tests performed: (Does it build, tested in-game, etc)

Known issues and TODO list:

• [ ]
• [ ]

[jackpoz]

Just wondering the behavior of old and new code in SSC elevator