Fix T99110: Crash after running view_all operator in VSE

Crash caused by NULL dereference, when `Editing` is not initialized.

Check if data is initialized in poll function.

3 files changed, 7 insertions, 1 deletions

diff --git a/source/blender/editors/space_sequencer/sequencer_edit.c b/source/blender/editors/space_sequencer/sequencer_edit.c
index 86c438c616e..16f663110ec 100644
--- a/source/blender/editors/space_sequencer/sequencer_edit.c
+++ b/source/blender/editors/space_sequencer/sequencer_edit.c
@@ -173,6 +173,11 @@ bool sequencer_edit_poll(bContext *C)
   return (SEQ_editing_get(CTX_data_scene(C)) != NULL);
 }
 
+bool sequencer_editing_initialized_and_active(bContext *C)
+{
+  return ED_operator_sequencer_active(C) && sequencer_edit_poll(C);
+}
+
 #if 0 /* UNUSED */
 bool sequencer_strip_poll(bContext *C)
 {
diff --git a/source/blender/editors/space_sequencer/sequencer_intern.h b/source/blender/editors/space_sequencer/sequencer_intern.h
index 3307c3fde2f..3f91be9e9e8 100644
--- a/source/blender/editors/space_sequencer/sequencer_intern.h
+++ b/source/blender/editors/space_sequencer/sequencer_intern.h
@@ -133,6 +133,7 @@ int seq_effect_find_selected(struct Scene *scene,
 
 /* Operator helpers. */
 bool sequencer_edit_poll(struct bContext *C);
+bool sequencer_editing_initialized_and_active(struct bContext *C);
 /* UNUSED */
 /* bool sequencer_strip_poll(struct bContext *C); */
 bool sequencer_strip_has_path_poll(struct bContext *C);
diff --git a/source/blender/editors/space_sequencer/sequencer_view.c b/source/blender/editors/space_sequencer/sequencer_view.c
index 857ca6d989b..f7ca753c052 100644
--- a/source/blender/editors/space_sequencer/sequencer_view.c
+++ b/source/blender/editors/space_sequencer/sequencer_view.c
@@ -373,7 +373,7 @@ void SEQUENCER_OT_view_selected(wmOperatorType *ot)
 
   /* Api callbacks. */
   ot->exec = sequencer_view_selected_exec;
-  ot->poll = ED_operator_sequencer_active;
+  ot->poll = sequencer_editing_initialized_and_active;
 
   /* Flags. */
   ot->flag = OPTYPE_REGISTER;