Fix (unreported): Crash on accessing active sequence in select groupped operator

This patch moves the NULL check of `actseq` to the correct position, which should happen
before the `channel` is assigned. Otherwise an attempt to call the `sequencer_select_grouped_exec`,
when there is no active sequence and `use_active_channel` set to true, results in a crash.

Reviewed By: ISS

Differential Revision: https://developer.blender.org/D7170

1 files changed, 5 insertions, 5 deletions

diff --git a/source/blender/editors/space_sequencer/sequencer_select.c b/source/blender/editors/space_sequencer/sequencer_select.c
index da4a69a9b33..7f243b8a6ad 100644
--- a/source/blender/editors/space_sequencer/sequencer_select.c
+++ b/source/blender/editors/space_sequencer/sequencer_select.c
@@ -1419,17 +1419,17 @@ static int sequencer_select_grouped_exec(bContext *C, wmOperator *op)
   Editing *ed = BKE_sequencer_editing_get(scene, false);
   Sequence *seq, *actseq = BKE_sequencer_active_get(scene);
 
+  if (actseq == NULL) {
+    BKE_report(op->reports, RPT_ERROR, "No active sequence!");
+    return OPERATOR_CANCELLED;
+  }
+
   const int type = RNA_enum_get(op->ptr, "type");
   const int channel = RNA_boolean_get(op->ptr, "use_active_channel") ? actseq->machine : 0;
   const bool extend = RNA_boolean_get(op->ptr, "extend");
 
   bool changed = false;
 
-  if (actseq == NULL) {
-    BKE_report(op->reports, RPT_ERROR, "No active sequence!");
-    return OPERATOR_CANCELLED;
-  }
-
   if (!extend) {
     SEQP_BEGIN (ed, seq) {
       seq->flag &= ~SELECT;