adapt compute_next_event to new signature

the 'utc' flag is now contained in the event itself and not given
as a flag to 'compute_next_event' anymore

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
Signed-off-by: Dietmar Maurer <dietmar@proxmox.com>

src/tape/inventory.rs

@@ -533,7 +533,7 @@ impl Inventory {
                         set_start_time
                     }
                     MediaSetPolicy::CreateAt(ref event) => {
-                        match event.compute_next_event(set_start_time, false) {
+                        match event.compute_next_event(set_start_time) {
                             Ok(Some(next)) => next,
                             Ok(None) | Err(_) => return i64::MAX,
                         }