scriptcomp: disable for loop optimization

[Daztek]

This optimization appears to cause issues with increment/decrement ops, like infinite loops. Disabling it for now.

Open issue: #141
Related PR: #86

Testing

The script in the open issue mentioned above that hit the TMI limit due to an infinite loop now works correctly.

Changelog

Changed

• scriptcomp: disabled a for loop optimization where the compiler would sometimes generate code that caused an infinite loop.

Licence

• I am licencing my change under the project's MIT licence, including all changes to GPL-3.0 licenced parts of the codebase.