Cycles / CPU Rendering:

* "Auto Detect" now again uses the umber of cores, instead number of cores + 1.

This was added before we had Tile rendering and benchmarks on several systems showed that there is no gain with this now. There might be some slight difference (0.5% or so) slower/faster depending on the scene, but this is negligible.

intern/cycles/device/device_cpu.cpp

@@ -307,8 +307,7 @@ public:
 
 	void task_add(DeviceTask& task)
 	{
-		/* split task into smaller ones, more than number of threads for uneven
-		 * workloads where some parts of the image render slower than others */
+		/* split task into smaller ones */
 		list<DeviceTask> tasks;
 		task.split(tasks, TaskScheduler::num_threads());