awesome/mpd_widget: fix nil access

Maybe address the issue where widget becomes unresponsive when the
playlist is emptied.

diff --git a/awesome/widgets/mpd_widget.lua b/awesome/widgets/mpd_widget.lua
index ccd131e304ccc94042c0b086ceabe292cf994a12..956fa4ca2d927afa44acb24daea9d775d042f316 100644 (file)
--- a/awesome/widgets/mpd_widget.lua
+++ b/awesome/widgets/mpd_widget.lua
@@ -22,6 +22,10 @@ widget.scroll = wibox.widget {
 }
 
 function widget:update_widget()
+    if not self._currentsong then
+        self._textbox.text = ""
+        return
+    end
     local text = ""
     local artist = self._currentsong.artist
     local title = self._currentsong.title