Unit.id() Error

Using `Unit.id()` writes a warning, `warning: [Lua] Broken 31 bit value. Use id32() or id_string() instead.`, to the console log every time the function is called. The issue is that this often results in literally thousands of warnings being written to the console log within a minute. Simply replacing `Unit.id()` with `Unit.id32()` as the warning suggest, seems to fix this issue without changing the mod's functionality.