Cycles: Code cleanup, spaces around keywords

This inconsistency drove me totally crazy, it's really confusing
when it's inconsistent especially when you work on both Cycles and
Blender sides.

Shouldn;t cause merge PITA, it's whitespace changes only, Git should
be able to merge it nicely.

intern/cycles/device/device_task.cpp

@@ -111,7 +111,7 @@ void DeviceTask::update_progress(RenderTile *rtile)
 	if(update_tile_sample) {
 		double current_time = time_dt();
 
-		if (current_time - last_update_time >= 1.0) {
+		if(current_time - last_update_time >= 1.0) {
 			update_tile_sample(*rtile);
 
 			last_update_time = current_time;