Cleanup: Move VSE channels check into own util function

Differential Revision: https://developer.blender.org/D12661

source/blender/blenkernel/intern/scene.c

@@ -997,7 +997,7 @@ static void link_recurs_seq(BlendDataReader *reader, ListBase *lb)
 
   LISTBASE_FOREACH_MUTABLE (Sequence *, seq, lb) {
     /* Sanity check. */
-    if ((seq->machine < 1) || (seq->machine > MAXSEQ)) {
+    if (!SEQ_valid_strip_channel(seq)) {
       BLI_freelinkN(lb, seq);
       BLO_read_data_reports(reader)->count.vse_strips_skipped++;
     }

source/blender/sequencer/SEQ_sequencer.h

@@ -89,6 +89,7 @@ void SEQ_sequence_base_dupli_recursive(const struct Scene *scene_src,
                                        const struct ListBase *seqbase,
                                        int dupe_flag,
                                        const int flag);
+bool SEQ_valid_strip_channel(struct Sequence *seq);
 
 /* Read and Write functions for .blend file data */
 void SEQ_blend_write(struct BlendWriter *writer, struct ListBase *seqbase);

source/blender/sequencer/intern/sequencer.c

@@ -636,6 +636,18 @@ void SEQ_sequence_base_dupli_recursive(const Scene *scene_src,
     seq_new_fix_links_recursive(seq);
   }
 }
+
+bool SEQ_valid_strip_channel(Sequence *seq)
+{
+  if (seq->machine < 1) {
+    return false;
+  }
+  if (seq->machine > MAXSEQ) {
+    return false;
+  }
+  return true;
+}
+
 /* r_prefix + [" + escaped_name + "] + \0 */
 #define SEQ_RNAPATH_MAXSTR ((30 + 2 + (SEQ_NAME_MAXSTR * 2) + 2) + 1)
 

source/blender/sequencer/intern/strip_transform.c

@@ -278,7 +278,7 @@ bool SEQ_transform_seqbase_shuffle_ex(ListBase *seqbasep,
     SEQ_time_update_sequence(evil_scene, test);
   }
 
-  if ((test->machine < 1) || (test->machine > MAXSEQ)) {
+  if (!SEQ_valid_strip_channel(test)) {
     /* Blender 2.4x would remove the strip.
      * nicer to move it to the end */