Fixed a NPE in WorldEdit.getSafeFile() when extensions is null.

src/main/java/com/sk89q/worldedit/WorldEdit.java

@@ -718,7 +718,7 @@ public class WorldEdit {
     private File getSafeFile(LocalPlayer player, File dir, String filename,
             String defaultExt, String[] extensions, boolean isSave)
             throws FilenameException {
-        if (extensions.length == 1 && extensions[0] == null) extensions = null;
+        if (extensions != null && (extensions.length == 1 && extensions[0] == null)) extensions = null;
 
         File f;
 
@@ -1258,6 +1258,7 @@ public class WorldEdit {
             } catch (WrappedCommandException e) {
                 throw e.getCause();
             } catch (UnhandledCommandException e) {
+                player.printError("Command could not be handled; invalid sender!");
                 return false;
             } finally {
                 session.remember(editSession);

src/main/java/com/sk89q/worldedit/bukkit/WorldEditCommand.java

@@ -1,47 +0,0 @@
-// $Id$
-/*
- * WorldEdit
- * Copyright (C) 2010 sk89q <http://www.sk89q.com> and contributors
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-package com.sk89q.worldedit.bukkit;
-
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.List;
-
-import org.bukkit.command.CommandSender;
-import com.sk89q.minecraft.util.commands.Command;
-import com.sk89q.minecraft.util.commands.CommandPermissions;
-
-public class WorldEditCommand extends org.bukkit.command.Command {
-
-    public WorldEditCommand(Command command, CommandPermissions commandPermissions) {
-        super(command.aliases()[0]);
-        this.description = command.desc();
-        this.usageMessage = "/"+getName()+" "+command.usage();
-
-        List<String> aliases = new ArrayList<String>(Arrays.asList(command.aliases()));
-        aliases.remove(0);
-        this.setAliases(aliases);
-    }
-
-    @Override
-    public boolean execute(CommandSender sender, String currentAlias, String[] args) {
-        // This method is never called. 
-        return true;
-    }
-}