Minor fixes

* Fix auto openning channels with id 0 (guild chats)
* Minor fix in print
* Fix use of items behind creatures with classic control
* Fix teleports of 1sqm

modules/corelib/util.lua

@@ -3,7 +3,7 @@
 function print(...)
   local msg = ""
   for i,v in ipairs({...}) do
-    msg = msg .. tostring(v) .. "\t"
+    msg = msg .. tostring(v) .. "    "
   end
   g_logger.log(LogInfo, msg)
 end