Fix remaining memory leak in MarbleGraphicsGridLayout.
Fix remaining memory leak in MarbleGraphicsGridLayout.

svn path=/trunk/KDE/kdeedu/marble/; revision=1064022

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