fixed a few issues with thw new task

Author: AbrarSyed

src/main/java/net/minecraftforge/gradle/user/TaskExtractDepAts.java

@@ -1,3 +1,22 @@
+/*
+ * A Gradle plugin for the creation of Minecraft mods and MinecraftForge plugins.
+ * Copyright (C) 2013 Minecraft Forge
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ * USA
+ */
 package net.minecraftforge.gradle.user;
 
 import java.io.File;
@@ -26,7 +45,7 @@
 public class TaskExtractDepAts extends DefaultTask
 {
     @InputFiles
-    private List<FileCollection> collections;
+    private List<FileCollection> collections = Lists.newArrayList();
     @OutputDirectory
     private Object               outputDir;