Fixed ISB starbase discount error (sirgwain#548)

* Fixed ISB starbase discount error in race.go

IDK if I need to edit `generated.go` or not, but I did it anyways to shut up VS code's error messages.
If need be I'll revert it.

* Fixed race.go

Shfhrkelwlafht

cs/race.go

@@ -749,7 +749,9 @@ func computeRaceSpec(race *Race, rules *Rules) RaceSpec {
 		spec.ScrapResourcesOffsetStarbase += lrtSpec.ScrapResourcesOffsetStarbase
 		spec.StartingPopulationFactor += lrtSpec.StartingPopulationFactorDelta
 		spec.StarbaseBuiltInCloakUnits += lrtSpec.StarbaseBuiltInCloakUnits
-		spec.StarbaseCostFactor = math.Max(spec.StarbaseCostFactor, lrtSpec.StarbaseCostFactorOffset) // this isn't cumulative
+		if lrtSpec.StarbaseCostFactor > 0 {
+			spec.StarbaseCostFactor = math.Min(spec.StarbaseCostFactor, lrtSpec.StarbaseCostFactor) // this isn't cumulative
+		}
 		spec.ResearchFactor += lrtSpec.ResearchFactorOffset
 		spec.ResearchSplashDamage += lrtSpec.ResearchSplashDamage
 		spec.ShieldStrengthFactor += lrtSpec.ShieldStrengthFactorOffset

cs/traits.go

@@ -78,7 +78,7 @@ type LRTSpec struct {
 	ScrapResourcesOffsetStarbase  float64         `json:"scrapResourcesOffsetStarbase,omitempty"`
 	StartingPopulationFactorDelta float64         `json:"startingPopulationFactorDelta,omitempty"`
 	StarbaseBuiltInCloakUnits     int             `json:"starbaseBuiltInCloakUnits,omitempty"`
-	StarbaseCostFactorOffset      float64         `json:"starbaseCostFactorOffset,omitempty"`
+	StarbaseCostFactor      float64         `json:"starbaseCostFactor,omitempty"`
 	ResearchFactorOffset          float64         `json:"researchFactorOffset,omitempty"`
 	ResearchSplashDamage          float64         `json:"researchSplashDamage,omitempty"`
 	ShieldStrengthFactorOffset    float64         `json:"shieldStrengthFactorOffset,omitempty"`
@@ -543,7 +543,7 @@ func armSpec() LRTSpec {
 func isbSpec() LRTSpec {
 	return LRTSpec{
 		StarbaseBuiltInCloakUnits: 40,  // 20% built in cloaking
-		StarbaseCostFactorOffset:  -.2, // starbases cost 20% less
+		StarbaseCostFactor:  0.8, // starbases cost 20% less (*0.8)
 	}
 }