add 2 more industry object flags

Author: LeftofZen

Dat/Objects/Industry/IndustryObjectFlags.cs

@@ -22,8 +22,8 @@ public enum IndustryObjectFlags : uint32_t
 		NotRotatable = 1 << 15,
 		CanBeFoundedByPlayer = 1 << 16,
 		RequiresAllCargo = 1 << 17,
-		unk_18 = 1 << 18,
-		unk_19 = 1 << 19,
+		CanIncreaseProduction = 1 << 18,
+		CanDecreaseProduction = 1 << 19,
 		RequiresElectricityPylons = 1 << 20,
 		HasShadows = 1 << 21,
 		unk_22 = 1 << 22,

Tests/LoadSaveTests.cs

@@ -383,7 +383,7 @@ void assertFunc(ILocoObject obj, IndustryObject struc) => Assert.Multiple(() =>
 				Assert.That(struc.BuildCostFactor, Is.EqualTo(400), nameof(struc.BuildCostFactor));
 				Assert.That(struc.CostIndex, Is.EqualTo(1), nameof(struc.CostIndex));
 				Assert.That(struc.DesignedYear, Is.EqualTo(0), nameof(struc.DesignedYear));
-				Assert.That(struc.Flags, Is.EqualTo(IndustryObjectFlags.BuiltOnLowGround | IndustryObjectFlags.BuiltAwayFromTown | IndustryObjectFlags.unk_18 | IndustryObjectFlags.unk_19), nameof(struc.Flags));
+				Assert.That(struc.Flags, Is.EqualTo(IndustryObjectFlags.BuiltOnLowGround | IndustryObjectFlags.BuiltAwayFromTown | IndustryObjectFlags.CanIncreaseProduction | IndustryObjectFlags.CanDecreaseProduction), nameof(struc.Flags));
 				Assert.That(struc.InitialProductionRate[0].Min, Is.EqualTo(8));
 				Assert.That(struc.InitialProductionRate[0].Max, Is.EqualTo(12));
 				Assert.That(struc.InitialProductionRate[1].Min, Is.EqualTo(0));