try to fix invalid MAC issue that happens in some cases

Limelight/Network/ServerInfoResponse.m

@@ -20,7 +20,12 @@
 - (void) populateHost:(TemporaryHost*)host {
     host.name = [[self getStringTag:TAG_HOSTNAME] trim];
     host.uuid = [[self getStringTag:TAG_UNIQUE_ID] trim];
-    host.mac = [[self getStringTag:TAG_MAC_ADDRESS] trim];
+    
+    
+    // try to fix invalid mac happens in some cases
+    NSString* tmpMac = [[self getStringTag:TAG_MAC_ADDRESS] trim];
+    if (!(tmpMac == nil || [tmpMac isEqualToString:@"00:00:00:00:00:00"])) host.mac = tmpMac;
+    
     host.currentGame = [[self getStringTag:TAG_CURRENT_GAME] trim];
     
     NSInteger httpsPort;