message: Use constant for FusionReactor base energy production
  Matches rest of code base use of constants
diff: #include "../../Constants.h"
  +const int FUSION_REACTOR_BASE_PRODUCUCTION = 1000;
  +
  class FusionReactor : public Structure
  {
  public:
  @@ -26,6 +28,6 @@ protected:
  void defineResourceOutput() override
  {
  - resourcesOut().energy(1000);
  + resourcesOut().energy(FUSION_REACTOR_BASE_PRODUCUCTION);
  }
  };
  