Fix drop statement

Instead of as_ref() we should use as_mut().

Signed-off-by: Markku Kylänpää <[email protected]>

Author: ttemjk

libhapp/src/device.rs

@@ -295,7 +295,7 @@ impl Drop for Device {
         }
 
         if self.device_file.is_some() {
-            drop(self.device_file.as_ref().unwrap());
+            drop(self.device_file.as_mut());
         }
     }
 }