message: Change SeedLander deploy callback signature
diff: #include "Structure.h"
  +#include "NAS2D/Renderer/Point.h"
  +
  class SeedLander: public Structure
  {
  public:
  - using Callback = NAS2D::Signals::Signal<int, int>;
  + using Callback = NAS2D::Signals::Signal<NAS2D::Point<int>>;
  public:
  SeedLander() = delete;
  @@ -41,7 +43,7 @@ protected:
  // Logic guard, probably not necessary.
  if (mX == 0 && mY == 0) { return; }
  - mDeploy(mX, mY);
  + mDeploy({mX, mY});
  }
  }
  