lua: icecast: show url as alternative for unknown stations

(cherry picked from commit 37fa606c)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

share/lua/sd/icecast.lua

@@ -29,8 +29,13 @@ function main()
     local tree = simplexml.parse_url("http://dir.xiph.org/yp.xml")
     for _, station in ipairs( tree.children ) do
         simplexml.add_name_maps( station )
+	local station_name = station.children_map["server_name"][1].children[1]
+	if station_name == "Unspecified name" or station_name == ""
+	then
+		station_name = station.children_map["listen_url"][1].children[1]
+	end
         vlc.sd.add_item( {path=station.children_map["listen_url"][1].children[1],
-                          title=station.children_map["server_name"][1].children[1],
+                          title=station_name,
                           genre=station.children_map["genre"][1].children[1],
                           nowplaying=station.children_map["current_song"][1].children[1],
                           meta={["Icecast"]={["Bitrate"]=station.children_map["bitrate"][1].children[1];