fixed bug when torrent file have announce-list but no valid trackers. #444

ChangeLog

@@ -25,6 +25,8 @@ release 0.14.2
 	* removed support for boost-1.33 and earlier (probably didn't work)
 	* fixed potential freezes issues at shutdown
 	* improved error message for python setup script
+	* fixed bug when torrent file included announce-list, but no valid
+	  tracker urls
 
 release 0.14.1
 

src/torrent_info.cpp

@@ -575,6 +575,8 @@ namespace libtorrent
 				}
 			}
 
+			if (!m_urls.empty())
+			{
 				// shuffle each tier
 				std::vector<announce_entry>::iterator start = m_urls.begin();
 				std::vector<announce_entry>::iterator stop;
@@ -590,6 +592,7 @@ namespace libtorrent
 				}
 				std::random_shuffle(start, stop);
 			}
+		}
 		
 
 		if (m_urls.empty())