As per commit 48a6854a1ca58aa291ffc6fe3a48807492dfbef7, fix armed track operations.

diff -Nuar a/cinelerra-5.1/cinelerra/commercials.C b/cinelerra-5.1/cinelerra/commercials.C
--- a/cinelerra-5.1/cinelerra/commercials.C	2020-06-26 13:38:35.393203559 +0000
+++ b/cinelerra-5.1/cinelerra/commercials.C	2020-06-26 13:49:34.314169992 +0000
@@ -551,7 +551,7 @@
 	Tracks *tracks = mwindow->edl->tracks;
 	for(Track *atrk=tracks->first; !cancelled && atrk; atrk=atrk->next) {
 		if( atrk->data_type != TRACK_AUDIO ) continue;
-		if( !atrk->record ) continue;
+		if( !atrk->is_armed() ) continue;
 		Edits *edits = atrk->edits;  Edit *next = 0;
 		for( Edit *edit=edits->first; !cancelled && edit; edit=next ) {
 			next = edit->next;
@@ -592,7 +592,7 @@
 	Tracks *tracks = mwindow->edl->tracks;
 	for( Track *vtrk=tracks->first; !cancelled && vtrk; vtrk=vtrk->next) {
 		if( vtrk->data_type != TRACK_VIDEO ) continue;
-		if( !vtrk->record ) continue;
+		if( !vtrk->is_armed() ) continue;
 		Edits *edits = vtrk->edits;  Edit *next = 0;
 		for( Edit *edit=edits->first; !cancelled && edit; edit=next ) {
 			next = edit->next;