fix inadvertently dropping MutexGuard in TickerControl

src/progress_bar.rs

@@ -687,7 +687,7 @@ impl TickerControl {
             drop(arc); // Also need to drop Arc otherwise BarState won't be dropped
 
             // Wait for `interval` but return early if we are notified to stop
-            let (_, result) = self
+            let result = self
                 .stopping
                 .1
                 .wait_timeout_while(self.stopping.0.lock().unwrap(), interval, |stopped| {
@@ -696,7 +696,7 @@ impl TickerControl {
                 .unwrap();
 
             // If the wait didn't time out, it means we were notified to stop
-            if !result.timed_out() {
+            if !result.1.timed_out() {
                 break;
             }
         }