Add default group "players" which are all player automaticaly added to

Add some error checks

factions.lua

@@ -331,7 +331,7 @@ end
 --! @return true/false (succesfully changed privileges)
 -------------------------------------------------------------------------------
 function factions.set_admin(name,playername,value)
-
+	mobf_assert_backtrace(type(playername) == "string")
 	if factions.data.factions[name] ~= nil then
 		if value then
 			factions.data.factions[name].adminlist[playername] = true
@@ -587,6 +587,10 @@ function factions.get_name(object)
 		return nil,true
 	end
 	
+	if object.object ~= nil then
+		object = object.object
+	end
+	
 	if object:is_player() then
 		return object:get_player_name(),false
 	else
@@ -735,4 +739,15 @@ function factions.load()
 		end
 	end
 
+	--create special faction players
+	factions.add_faction("players")
+
+	--autojoin players to faction players
+	minetest.register_on_joinplayer(
+		function(player)
+			if player:is_player() then
+				factions.member_add("players",player)
+			end
+		end
+	)
 end

init.lua

@@ -12,7 +12,7 @@
 -- Contact sapier a t gmx net
 -------------------------------------------------------------------------------
 
-local factions_version = "0.1.4"
+local factions_version = "0.1.5"
 
 print("MOD: factions (by sapier) loading ...")