Fix for HADOOP-77. Fixes some NPEs. Contributed by Stefan.

git-svn-id: https://svn.apache.org/repos/asf/lucene/hadoop/trunk@385655 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/hadoop/mapred/JobInProgress.java

@@ -38,8 +38,8 @@ class JobInProgress {
     File localJobFile = null;
     File localJarFile = null;
 
-    TaskInProgress maps[] = null;
-    TaskInProgress reduces[] = null;
+    TaskInProgress maps[] = new TaskInProgress[0];
+    TaskInProgress reduces[] = new TaskInProgress[0];
     int numMapTasks = 0;
     int numReduceTasks = 0;