Fix a (harmless) user creation error

When a players map is set, it automatically triggers a player record
write.  When a new player is being created, the map is set before
the player is added via @addchar.

This attempted to write record number undefined in the player file,
which threw an exception.  Since exceptions are being caught, logged,
and ignored, this did not cause a problem, but did log an error when
it wasn't necessary.

xtrn/lord2/l2lib.js

@@ -40,9 +40,11 @@ function savetime()
 
 function player_put()
 {
+	if (player.Record !== undefined) {
 		player.lastsaved = savetime();
 		player.put();
 	}
+}
 
 var Player_Def = [
 	{	// 0