Fix crash when using bloom with the default rendering pipeline
Fix crash when using bloom with the default rendering pipeline

RaananW/Babylon.js,Kesshi/Babylon.js,sebavan/Babylon.js,NicolasBuecher/Babylon.js,Kesshi/Babylon.js,sebavan/Babylon.js,sebavan/Babylon.js,Kesshi/Babylon.js,RaananW/Babylon.js,RaananW/Babylon.js,BabylonJS/Babylon.js,BabylonJS/Babylon.js,BabylonJS/Babylon.js,NicolasBuecher/Babylon.js,NicolasBuecher/Babylon.js