Fix file device cached child issue

When opening the previously-visited directory in the file device, the
directory data is read from a cache, preventing the need to have it
regenerated from scratch. The directory data includes the selected
child, which meant that instead of child 0 being selected as per the
specification, the previously-selected child was selected instead.

To fix this, the child is deselected as the directory data is cached.

1 files changed, 5 insertions, 0 deletions

diff --git a/src/devices/file_device/directory_listing.rs b/src/devices/file_device/directory_listing.rs
index 1d7ddd2..465efc7 100644
--- a/src/devices/file_device/directory_listing.rs
+++ b/src/devices/file_device/directory_listing.rs
@@ -100,6 +100,11 @@ impl DirectoryListing {
         }
     }
 
+    pub fn deselect_child(&mut self) {
+        self.child_path_buffer.clear();
+        self.selected = None;
+    }
+
     pub fn child_path_buffer(&mut self) -> &mut BedrockPathBuffer {
         &mut self.child_path_buffer
     }