[Bf-blender-cvs] [adccc4ce457] cycles-x: Fix Cycles X crash viewing render result prior rendering

[Sergey Sharybin]

Commit: adccc4ce4575918e9725abe32e515544bfcdba5a
Author: Sergey Sharybin
Date:   Fri Sep 17 11:51:24 2021 +0200
Branches: cycles-x
https://developer.blender.org/rBadccc4ce4575918e9725abe32e515544bfcdba5a

Fix Cycles X crash viewing render result prior rendering

===================================================================

M	source/blender/draw/engines/external/external_engine.c

===================================================================

diff --git a/source/blender/draw/engines/external/external_engine.c b/source/blender/draw/engines/external/external_engine.c
index de21a69e550..cc548a53a8e 100644
--- a/source/blender/draw/engines/external/external_engine.c
+++ b/source/blender/draw/engines/external/external_engine.c
@@ -511,6 +511,10 @@ bool DRW_engine_external_acquire_for_image_editor(void)
   /* Render is allocated on main thread, so it is safe to access it from here. */
   Render *re = RE_GetSceneRender(scene);
 
+  if (re == NULL) {
+    return false;
+  }
+
   return RE_engine_draw_acquire(re);
 }