Draw manager: Fix wrong engine type used for view update

Was causing temporal sampling artifacts when scene is set to Cycles
and viewport is set to Eevee. Visually was looking like ghosting or
motion blur when moving objects.

source/blender/editors/render/render_update.c

@@ -120,9 +120,10 @@ void ED_render_scene_update(const DEGEditorUpdateContext *update_ctx, int update
 		CTX_wm_window_set(C, win);
 
 		for (sa = sc->areabase.first; sa; sa = sa->next) {
-			if (sa->spacetype != SPACE_VIEW3D)
+			if (sa->spacetype != SPACE_VIEW3D) {
 				continue;
-
+			}
+			View3D *v3d = sa->spacedata.first;
 			for (ar = sa->regionbase.first; ar; ar = ar->next) {
 				if (ar->regiontype != RGN_TYPE_WINDOW) {
 					continue;
@@ -143,7 +144,8 @@ void ED_render_scene_update(const DEGEditorUpdateContext *update_ctx, int update
 
 				}
 				else {
-					RenderEngineType *engine_type = RE_engines_find(scene->r.engine);
+					RenderEngineType *engine_type =
+					        ED_view3d_engine_type(scene, v3d->drawtype);
 					if (updated) {
 						DRW_notify_view_update(
 						        (&(DRWUpdateContext){