VSE: Sanitize move_to_meta usage

There were multiple cases that could lead to problems like moving meta
strip into itself or into it's children meta strips.

Print error string to console when invalid action is requested.

1 files changed, 4 insertions, 3 deletions

diff --git a/source/blender/sequencer/SEQ_edit.h b/source/blender/sequencer/SEQ_edit.h
index 38ce665563c..2711e0a7ee3 100644
--- a/source/blender/sequencer/SEQ_edit.h
+++ b/source/blender/sequencer/SEQ_edit.h
@@ -33,9 +33,10 @@ struct Scene;
 struct Sequence;
 
 int SEQ_edit_sequence_swap(struct Sequence *seq_a, struct Sequence *seq_b, const char **error_str);
-int SEQ_edit_move_strip_to_meta(struct Scene *scene,
-                                struct Sequence *src_seq,
-                                struct Sequence *dst_seqm);
+bool SEQ_edit_move_strip_to_meta(struct Scene *scene,
+                                 struct Sequence *src_seq,
+                                 struct Sequence *dst_seqm,
+                                 const char **error_str);
 void SEQ_edit_flag_for_removal(struct Scene *scene,
                                struct ListBase *seqbase,
                                struct Sequence *seq);