Alright, I will find the exact place in your code where the overflow occurs and patch it in another way. I don't think this breaks the save game format as you claim though.
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You cannot just mess with such definitions w/o making sure they are not used e.g. in level file formats.
You are e.g. breaking the save game format with your change. You had better posted a bug report explaining where exactly the crash occurs.
Alright, I will find the exact place in your code where the overflow occurs and patch it in another way. I don't think this breaks the save game format as you claim though.