[GEN] Unwrapped loop in GameLogic::rebalanceChildSleepyUpdate causes problems under debug

### Area(s) with this issue?

_No response_

### Describe the issue

The "Fast" unrolled loop in GameLogic.cpp on line 2510 casues stl library asserts when run under debug.

There is something wrong with how it is handling the iterator, this could be due to STLPORT differences.

### Steps to reproduce

Run Generals under debug in VS22

### Attachments

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