db/upnp/Object: add attribute "url"

src/db/UpnpDatabasePlugin.cxx

@@ -237,7 +237,7 @@ static Song *
 upnpItemToSong(const UPnPDirObject &dirent, const char *uri)
 {
 	if (*uri == 0)
-		uri = dirent.getprop("url");
+		uri = dirent.url.c_str();
 
 	Song *s = Song::NewFile(uri, nullptr);
 

src/db/upnp/Directory.cxx

@@ -168,7 +168,7 @@ protected:
 			break;
 		case 'r':
 			if (!m_path.back().compare("res")) {
-				m_tobj.m_props["url"] += str;
+				m_tobj.url = str;
 			}
 			break;
 		case 'u':

src/db/upnp/Object.hxx

@@ -51,6 +51,7 @@ public:
 
 	std::string m_id; // ObjectId
 	std::string m_pid; // Parent ObjectId
+	std::string url;
 	std::string m_title; // dc:title. Directory name for a container.
 	Type type;
 	ItemClass item_class;
@@ -81,6 +82,7 @@ public:
 	{
 		m_id.clear();
 		m_pid.clear();
+		url.clear();
 		m_title.clear();
 		type = Type::UNKNOWN;
 		item_class = ItemClass::UNKNOWN;