Eric Jiang authored Jul 04, 2022 and Julius Künzel committed Jul 04, 2022

When creating a new KdenliveDoc, the activeTrack property was set to be
the last audio track's position + 1. If a new document with 0 video
tracks is created, then activeTrack is out of range and causes a crash
later in TimelineController::documentProperties().

This fixes BUG: 442545