[Bf-blender-cvs] [b9ae5177947] blender2.8: Add missing NULL check

[Campbell Barton]

Commit: b9ae517794765d6a16604de2803145e859bafb9d
Author: Campbell Barton
Date:   Wed Mar 7 16:40:02 2018 +1100
Branches: blender2.8
https://developer.blender.org/rBb9ae517794765d6a16604de2803145e859bafb9d

Add missing NULL check

Caused loading user-prefs to crash.

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M	source/blender/editors/scene/scene_edit.c

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diff --git a/source/blender/editors/scene/scene_edit.c b/source/blender/editors/scene/scene_edit.c
index da720272f67..6298f03a6b0 100644
--- a/source/blender/editors/scene/scene_edit.c
+++ b/source/blender/editors/scene/scene_edit.c
@@ -134,7 +134,7 @@ void ED_scene_change_update(
 	CTX_data_eval_ctx(C, &eval_ctx_old);
 	eObjectMode object_mode_old = workspace->object_mode;
 	ViewLayer *layer_old = BKE_view_layer_from_workspace_get(scene_old, workspace);
-	Object *obact_old = OBACT(layer_old);
+	Object *obact_old = layer_old ? OBACT(layer_old) : NULL;
 	bool obact_new_mode_exists = ED_object_mode_generic_exists(bmain->wm.first, obact_new, workspace->object_mode);