message: Use named constant for SEED_POWER_PRODUCTION
diff: #include "Structure.h"
  +const int SEED_POWER_PRODUCTION = 50;
  +
  class SeedPower: public Structure
  {
  public:
  @@ -17,6 +19,6 @@ public:
  protected:
  void defineResourceOutput() override
  {
  - resourcesOut().energy(50);
  + resourcesOut().energy(SEED_POWER_PRODUCTION);
  }
  };
  