c3bb43d: Allow Pointer to exist without a class instance

https://github.com/rotmg-network/ReClass.NET/commit/74d6ccf6f45aa6637a355fc33c3970b038548b90#diff-71b7082e669db806b76c24e4278ae40bcb5a32ad15bc0ffeaae507fe04a29a8a