for( Edit *edit=track->edits->first; edit; edit=edit->next ) {
if( start_pos >= edit->startproject+edit->length ) continue;
if( edit->startproject >= end_pos ) continue;
for( Edit *edit=track->edits->first; edit; edit=edit->next ) {
if( start_pos >= edit->startproject+edit->length ) continue;
if( edit->startproject >= end_pos ) continue;