Fix incorrect audio cache directory reference

core/src/cache.rs

@@ -94,16 +94,16 @@ impl Cache {
             mkdir_existing(path.parent().unwrap()).unwrap();
 
             let mut cache_file = File::create(path).unwrap_or_else(|_e| {
-                ::std::fs::remove_dir_all(&self.root.join("files")).unwrap();
-                mkdir_existing(&self.root.join("files")).unwrap();
+                ::std::fs::remove_dir_all(&self.audio_root.join("files")).unwrap();
+                mkdir_existing(&self.audio_root.join("files")).unwrap();
 
                 let path = self.file_path(file);
                 mkdir_existing(path.parent().unwrap()).unwrap();
                 File::create(path).unwrap()
             });
             ::std::io::copy(contents, &mut cache_file).unwrap_or_else(|_e| {
-                ::std::fs::remove_dir_all(&self.root.join("files")).unwrap();
-                mkdir_existing(&self.root.join("files")).unwrap();
+                ::std::fs::remove_dir_all(&self.audio_root.join("files")).unwrap();
+                mkdir_existing(&self.audio_root.join("files")).unwrap();
 
                 let path = self.file_path(file);
                 mkdir_existing(path.parent().unwrap()).unwrap();