Fixed issue causing the Hospital to not be able to be built. Thank you to Dalwand for pointing out the issue and thank you to Tophat and Jarcast for helping me fix it (by which I mean they did basically all of it). You guys are great.

Also decided to do a slight bit of nerfing to the Dijk by increasing the normal maintenance cost from 1 gpt to 2 gpt, and by increasing the production cost from +20% to +25%.