When an error is sent, also send its type

src/com/sheepit/client/Error.java

@@ -21,27 +21,38 @@ package com.sheepit.client;
 
 public class Error {
 	public enum Type {
-		OK,
-		WRONG_CONFIGURATION,
-		AUTHENTICATION_FAILED,
-		TOO_OLD_CLIENT,
-		SESSION_DISABLED,
-		RENDERER_NOT_AVAILABLE,
-		MISSING_RENDER,
-		MISSING_SCENE,
-		NOOUTPUTFILE,
-		DOWNLOAD_FILE,
-		CAN_NOT_CREATE_DIRECTORY,
-		NETWORK_ISSUE,
-		RENDERER_CRASHED,
-		RENDERER_OUT_OF_VIDEO_MEMORY,
-		RENDERER_KILLED,
-		RENDERER_MISSING_LIBRARIES,
-		FAILED_TO_EXECUTE,
-		OS_NOT_SUPPORTED,
-		CPU_NOT_SUPPORTED,
-		GPU_NOT_SUPPORTED,
-		UNKNOWN
+		// id have to be kept synchronised with the server side.
+		OK(0),
+		UNKNOWN(99),
+		WRONG_CONFIGURATION(1),
+		AUTHENTICATION_FAILED(2),
+		TOO_OLD_CLIENT(3),
+		SESSION_DISABLED(4),
+		RENDERER_NOT_AVAILABLE(5),
+		MISSING_RENDER(6),
+		MISSING_SCENE(7),
+		NOOUTPUTFILE(8),
+		DOWNLOAD_FILE(9),
+		CAN_NOT_CREATE_DIRECTORY(10),
+		NETWORK_ISSUE(11),
+		RENDERER_CRASHED(12),
+		RENDERER_OUT_OF_VIDEO_MEMORY(13),
+		RENDERER_KILLED(14),
+		RENDERER_MISSING_LIBRARIES(15),
+		FAILED_TO_EXECUTE(16),
+		OS_NOT_SUPPORTED(17),
+		CPU_NOT_SUPPORTED(18),
+		GPU_NOT_SUPPORTED(19);
+		
+		private final int id;
+		
+		private Type(int id) {
+			this.id = id;
+		}
+		
+		public int getValue() {
+			return id;
+		}
 	}
 	
 	public enum ServerCode {