Add static assert to check config enum type

src/openrct2/config/IniWriter.hpp

@@ -31,6 +31,8 @@ interface IIniWriter
 
     template<typename T> void WriteEnum(const std::string& name, T value, const IConfigEnum<T>& configEnum)
     {
+        static_assert(sizeof(T) <= sizeof(int32_t), "Type too large");
+
         std::string key = configEnum.GetName(value);
         if (key.empty())
         {