FixIndexIfRequired in NativeListItem<T> might set the index under zero and cause an exception

[justalemon]

[01:14:03] [ERROR] Caught unhandled exception:
System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
at System.ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument argument, ExceptionResource resource)
at System.Collections.Generic.List1.get_Item(Int32 index) at LemonUI.Menus.NativeListItem1.get_SelectedItem() in G:\Grand Theft Auto\LemonUI\LemonUI\Menus\NativeListItem{T}.cs:line 63
at LemonUI.Menus.NativeListItem1.UpdateIndex() in G:\Grand Theft Auto\LemonUI\LemonUI\Menus\NativeListItem{T}.cs:line 159 at LemonUI.Menus.NativeListItem1.Add(Int32 position, T item) in G:\Grand Theft Auto\LemonUI\LemonUI\Menus\NativeListItem{T}.cs:line 202
at LemonUI.Menus.NativeListItem`1.Add(T item) in G:\Grand Theft Auto\LemonUI\LemonUI\Menus\NativeListItem{T}.cs:line 177