Make sure to be called just once to avoid having to disconnect any slots.
Make sure to be called just once to avoid having to disconnect any slots.

svn path=/trunk/KDE/kdeedu/marble/; revision=1184938

tzapzoor/marble,Earthwings/marble,utkuaydin/marble,tucnak/marble,probonopd/marble,oberluz/marble,probonopd/marble,tzapzoor/marble,tzapzoor/marble,tzapzoor/marble,AndreiDuma/marble,tucnak/marble,utkuaydin/marble,Earthwings/marble,quannt24/marble,tucnak/marble,Earthwings/marble,AndreiDuma/marble,David-Gil/marble-dev,tzapzoor/marble,utkuaydin/marble,oberluz/marble,rku/marble,rku/marble,Earthwings/marble,quannt24/marble,tucnak/marble,adraghici/marble,quannt24/marble,oberluz/marble,oberluz/marble,utkuaydin/marble,David-Gil/marble-dev,quannt24/marble,AndreiDuma/marble,oberluz/marble,probonopd/marble,adraghici/marble,probonopd/marble,David-Gil/marble-dev,tzapzoor/marble,tzapzoor/marble,tucnak/marble,utkuaydin/marble,quannt24/marble,David-Gil/marble-dev,tucnak/marble,rku/marble,Earthwings/marble,adraghici/marble,tzapzoor/marble,David-Gil/marble-dev,probonopd/marble,quannt24/marble,adraghici/marble,quannt24/marble,Earthwings/marble,David-Gil/marble-dev,utkuaydin/marble,adraghici/marble,tucnak/marble,adraghici/marble,AndreiDuma/marble,oberluz/marble,rku/marble,rku/marble,rku/marble,AndreiDuma/marble,AndreiDuma/marble,probonopd/marble,probonopd/marble