Attempt to fix SparkListenerSuite breakage

Could not reproduce locally, but this test could've been flaky if the
build machine was too fast.

core/src/test/scala/org/apache/spark/scheduler/SparkListenerSuite.scala

@@ -83,7 +83,7 @@ class SparkListenerSuite extends FunSuite with LocalSparkContext with ShouldMatc
       i
     }
 
-    val d = sc.parallelize(1 to 1e4.toInt, 64).map{i => w(i)}
+    val d = sc.parallelize(0 to 1e4.toInt, 64).map{i => w(i)}
     d.count()
     assert(sc.dagScheduler.listenerBus.waitUntilEmpty(WAIT_TIMEOUT_MILLIS))
     listener.stageInfos.size should be (1)