Updated WorldGuard to catch a missing WorldEdit.

CHANGELOG.txt

@@ -1,3 +1,6 @@
+2.0beta2:
+- Fixed a NullPointerException in the damage hook.
+
 2.0beta1:
 - Added area protection. Use /region or /rg to define regions.
 

src/WorldGuard.java

@@ -45,7 +45,14 @@ public class WorldGuard extends Plugin {
      * Initialize the plugin.
      */
     public WorldGuard() {
-        listener = new WorldGuardListener(this);
+        try {
+            listener = new WorldGuardListener(this);
+        } catch (NoClassDefFoundError e) {
+            logger.severe("*** WORLDGUARD FAILED TO LOAD. ALL PROTECTION IS DISABLED!");
+            logger.severe("*** YOUR SERVER WILL BE SAVED AND STOPPED TO PREVENT DAMAGE TO YOUR WORLD. DISABLE WORLDGUARD OR CORRECT THE PROBLEM.");
+            logger.severe("*** WorldEdit must be placed into the plugins/ directory");
+            etc.getServer().useConsoleCommand("stop");
+        }
     }
 
     /**
@@ -53,6 +60,10 @@ public class WorldGuard extends Plugin {
      */
     @Override
     public void initialize() {
+        if (listener == null) {
+            return;
+        }
+        
         List<String> missingFeatures = new ArrayList<String>();
 
         registerHook("COMMAND", PluginListener.Priority.MEDIUM);
@@ -110,6 +121,10 @@ public class WorldGuard extends Plugin {
      */
     @Override
     public void enable() {
+        if (listener == null) {
+            return;
+        }
+        
         logger.log(Level.INFO, "WorldGuard version " + getVersion() + " loaded");
         listener.loadConfiguration();
 

src/WorldGuardListener.java

@@ -1474,7 +1474,7 @@ public class WorldGuardListener extends PluginListener {
                 return true;
             }
             
-            if (attacker.isPlayer()) {
+            if (attacker != null && attacker.isPlayer()) {
                 if (useRegions) {
                     Vector pt = new Vector(defender.getX(),
                             defender.getY(), defender.getZ());