MINOR: task: Also consider the task list size when getting global tasks.

We're taking tasks from the global runqueue based on the number of tasks
the thread already have in its local runqueue, but now that we have a task
list, we also have to take that into account.
diff --git a/src/task.c b/src/task.c
index 25ffe21..fb48407 100644
--- a/src/task.c
+++ b/src/task.c
@@ -260,7 +260,7 @@
 		 * much elements from the global list as to have a bigger local queue
 		 * than the average.
 		 */
-		while (rqueue_size[tid] <= average) {
+		while ((task_list_size[tid] + rqueue_size[tid]) <= average) {
 
 			/* we have to restart looking up after every batch */
 			rq_next = eb32sc_lookup_ge(&rqueue, rqueue_ticks - TIMER_LOOK_BACK, tid_bit);