Cleanup resources when empc has been disconnected by the server

empc.el

@@ -291,10 +291,11 @@ For status:
 (defun empc-process-sentinel (proc event)
   "Process sentinel for `empc-process'."
   (let ((debug-on-error t)
-	(status (process-status proc)))
+        (status (process-status proc)))
     (cond ((eq status 'closed)
-	   (when empc-verbose
-	     (message "empc: connection closed"))))))
+           (when empc-verbose
+             (message "empc: connection closed"))
+           (empc-cleanup)))))
 
 (defun empc-process-filter (object string)
   "Append STRING to the process buffer then process the data."
@@ -742,10 +743,14 @@ Send the password or retrieve available commands."
   "Close connection between empc and mpd."
   (interactive)
   (let* ((process (empc-process empc-object)))
-    (when (and process
-	       (processp process)
-	       (eq (process-status process) 'open))
-      (empc-send-close)))
+    (if (and process
+             (processp process)
+             (eq (process-status process) 'open))
+        (empc-send-close)
+      (empc-cleanup))))
+
+(defun empc-cleanup ()
+  "Cleanup empc resources after disconnection."
   (when empc-object
     (empc-close empc-object))
   (empc-mode-line nil)