Avoid a crash when reading malformed .mt files

color component values greater than 255 would cause the app to crash

src/main/java/amidst/gameengineabstraction/world/biome/BiomeBase.java

@@ -1,6 +1,7 @@
 package amidst.gameengineabstraction.world.biome;
 
 import amidst.documentation.GsonConstructor;
+import amidst.logging.AmidstLogger;
 import amidst.mojangapi.world.biome.BiomeColor;
 import amidst.settings.biomeprofile.BiomeColorJson;
 
@@ -50,8 +51,14 @@ public abstract class BiomeBase implements IBiome {
 	
 	public BiomeColor getDefaultColor() {
 		if (defaultColor == null) {
-			// Must have been deserialized rather than constructed
-			defaultColor = BiomeColor.fromBiomeColorJson(color);			
+			try {
+				// Must have been deserialized rather than constructed
+				defaultColor = BiomeColor.fromBiomeColorJson(color);
+			} catch(IllegalArgumentException ex) {
+				// badly formatted data file
+				AmidstLogger.error("Biome \"" + name + "\" has invalid colour");
+				defaultColor = BiomeColor.error();
+			}
 		}
 		return defaultColor;
 	}

src/main/java/amidst/mojangapi/world/biome/BiomeColor.java

@@ -19,7 +19,12 @@ public class BiomeColor {
 		return UNKNOWN_BIOME_COLOR;
 	}
 
+	public static BiomeColor error() {
+		return ERROR_BIOME_COLOR;
+	}
+	
 	private static final BiomeColor UNKNOWN_BIOME_COLOR = new BiomeColor(0, 0, 0);
+	private static final BiomeColor ERROR_BIOME_COLOR = new BiomeColor(255, 0, 255);
 
 	private static final int DESELECT_NUMBER = 30;
 	private static final int LIGHTEN_BRIGHTNESS = 40;