Add a serialVersionUID to other classes that were missing them. Thanks to Andreas for the report.

BUG=4

src/com/google/bitcoin/core/Address.java

@@ -54,7 +54,7 @@ public class Address {
      *
      * <pre>new Address(NetworkParameters.prodNet(), "17kzeh4N8g49GFvdDzSf8PjaPfyoD1MndL");</pre>
      */
-    public Address(NetworkParameters params,  String address) throws AddressFormatException {
+    public Address(NetworkParameters params, String address) throws AddressFormatException {
         this.params = params;
         this.hash160 = strToHash160(address);
     }

src/com/google/bitcoin/core/AddressMessage.java

@@ -4,6 +4,7 @@ import java.util.ArrayList;
 import java.util.List;
 
 public class AddressMessage extends Message {
+    private static final long serialVersionUID = 8058283864924679460L;
     private static final long MAX_ADDRESSES = 1024;
     List<PeerAddress> addresses;
 

src/com/google/bitcoin/core/Block.java

@@ -33,8 +33,9 @@ import static com.google.bitcoin.core.Utils.*;
  * you grab it from a downloaded {@link BlockChain}.
  */
 public class Block extends Message {
-    static final long ALLOWED_TIME_DRIFT = 2 * 60 * 60;  // Same value as official client.
+    private static final long serialVersionUID = -2834162413473103042L;
 
+    static final long ALLOWED_TIME_DRIFT = 2 * 60 * 60;  // Same value as official client.
     /** A value for difficultyTarget (nBits) that allows half of all possible hash solutions. Used in unit testing. */
     static final long EASIEST_DIFFICULTY_TARGET = 0x207fFFFFL;
 

src/com/google/bitcoin/core/GetBlocksMessage.java

@@ -21,6 +21,7 @@ import java.io.IOException;
 import java.util.List;
 
 public class GetBlocksMessage extends Message {
+    private static final long serialVersionUID = 3479412877853645644L;
     private final List<byte[]> locator;
     private final byte[] stopHash;
 

src/com/google/bitcoin/core/GetDataMessage.java

@@ -17,6 +17,8 @@
 package com.google.bitcoin.core;
 
 public class GetDataMessage extends Message {
+    private static final long serialVersionUID = 2754681589501709887L;
+
     public GetDataMessage(NetworkParameters params, byte[] payloadBytes) throws ProtocolException {
         super(params, payloadBytes, 0);
     }

src/com/google/bitcoin/core/InventoryMessage.java

@@ -24,8 +24,9 @@ import java.util.ArrayList;
 import java.util.List;
 
 public class InventoryMessage extends Message {
+    private static final long serialVersionUID = -7050246551646107066L;
     private static final long MAX_INVENTORY_ITEMS = 50000;
-    
+
     // For some reason the compiler complains if this is inside InventoryItem
     public List<InventoryItem> items;
 

src/com/google/bitcoin/core/Message.java

@@ -31,6 +31,8 @@ import java.util.Arrays;
  * This class is not useful for library users. If you want to talk to the network see the {@link Peer} class.
  */
 public abstract class Message implements Serializable {
+    private static final long serialVersionUID = -3561053461717079135L;
+
     public static final int MAX_SIZE = 0x02000000;
 
     // Useful to ensure serialize/deserialize are consistent with each other.

src/com/google/bitcoin/core/UnknownMessage.java

@@ -17,6 +17,7 @@
 package com.google.bitcoin.core;
 
 public class UnknownMessage extends Message {
+    private static final long serialVersionUID = 3614705938207918775L;
     private String name;
 
     public UnknownMessage(NetworkParameters params, String name, byte[] payloadBytes) throws ProtocolException {

src/com/google/bitcoin/core/VersionMessage.java

@@ -23,6 +23,8 @@ import java.net.InetAddress;
 import java.net.UnknownHostException;
 
 public class VersionMessage extends Message {
+    private static final long serialVersionUID = 7313594258967483180L;
+
     /**
      * The protocol version this library implements. A value of 31800 means 0.3.18.00.
      */

src/com/google/bitcoin/core/Wallet.java

@@ -264,7 +264,6 @@ public class Wallet implements Serializable {
      * our coins. This should be an address we own (is in the keychain).
      * @return a new {@link Transaction} or null if we cannot afford this send.
      */
-
     synchronized Transaction createSend(Address address,  BigInteger nanocoins, Address changeAddress) {
         Utils.LOG("Creating send tx to " + address.toString() + " for " +
                 Utils.bitcoinValueToFriendlyString(nanocoins));