fix for #5

check if thumbnail exist

mumbleBot.py

@@ -207,9 +207,9 @@ class MumbleBot:
                 folder_path = var.config.get('bot', 'music_folder')
 
                 files = util.get_recursive_filelist_sorted(folder_path)
-                if files :
+                if files:
                     self.mumble.users[text.actor].send_message('<br>'.join(files))
-                else :
+                else:
                     self.mumble.users[text.actor].send_message(var.config.get('strings', 'no_file'))
 
             elif command == var.config.get('command', 'queue'):
@@ -252,7 +252,10 @@ class MumbleBot:
             path, title = self.download_music(url)
             var.current_music[1] = url
 
-            im = Image.open(var.config.get('bot', 'tmp_folder') + hashlib.md5(url.encode()).hexdigest() + '.jpg')
+            path_thumbnail = var.config.get('bot', 'tmp_folder') + hashlib.md5(url.encode()).hexdigest() + '.jpg'
+            thumbnail_html = ""
+            if os.path.isfile(path_thumbnail):
+                im = Image.open(path_thumbnail)
                 im.thumbnail((100, 100), Image.ANTIALIAS)
                 buffer = BytesIO()
                 im.save(buffer, format="JPEG")