refactor: planet industry production

internal/model/game/ship.go

@@ -1,6 +1,8 @@
 package game
 
 import (
+	"fmt"
+
 	"github.com/google/uuid"
 )
 
@@ -42,8 +44,8 @@ func (st ShipType) DriveBlockMass() float64 {
 }
 
 func (st ShipType) WeaponsBlockMass() float64 {
-	if st.Armament == 0 || st.Weapons == 0 {
-		return 0
+	if (st.Armament == 0 && st.Weapons != 0) || (st.Armament != 0 && st.Weapons == 0) {
+		panic(fmt.Sprintf("ship class invalid design: A=%d W=%.03f", st.Armament, st.Weapons))
 	}
 	return float64(st.Armament+1) * (st.Weapons.F() / 2)
 }