MINOR: task/stream: tasks related to a stream must be init by the caller.

The task_wakeup was called on stream_new, but the task/stream
wasn't fully initialized yet. The task_wakeup must be called
explicitly by the caller once the task/stream is initialized.
diff --git a/src/stream.c b/src/stream.c
index bc8b3af..7874837 100644
--- a/src/stream.c
+++ b/src/stream.c
@@ -239,9 +239,10 @@
 
 	/* it is important not to call the wakeup function directly but to
 	 * pass through task_wakeup(), because this one knows how to apply
-	 * priorities to tasks.
+	 * priorities to tasks. Using multi thread we must be sure that
+	 * stream is fully initialized before calling task_wakeup. So
+	 * the caller must handle the task_wakeup
 	 */
-	task_wakeup(t, TASK_WOKEN_INIT);
 	return s;
 
 	/* Error unrolling */