[Bf-blender-cvs] [0b697934878] master: Fix T94254: Crash using view_all operator in VSE

[Richard Antalik]

Commit: 0b697934878e049b1690fe135570c9fd72c4332e
Author: Richard Antalik
Date:   Mon Dec 20 02:15:23 2021 +0100
Branches: master
https://developer.blender.org/rB0b697934878e049b1690fe135570c9fd72c4332e

Fix T94254: Crash using view_all operator in VSE

Caused by `NULL` dereference in `SEQ_meta_stack_active_get()`.

Check if `Editing` is `NULL` before accessing meta stack.

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

M	source/blender/sequencer/intern/sequencer.c

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

diff --git a/source/blender/sequencer/intern/sequencer.c b/source/blender/sequencer/intern/sequencer.c
index e457b878be6..e4120a3cf95 100644
--- a/source/blender/sequencer/intern/sequencer.c
+++ b/source/blender/sequencer/intern/sequencer.c
@@ -419,6 +419,10 @@ void SEQ_meta_stack_free(Editing *ed, MetaStack *ms)
 
 MetaStack *SEQ_meta_stack_active_get(const Editing *ed)
 {
+  if (ed == NULL) {
+    return NULL;
+  }
+
   return ed->metastack.last;
 }