tidied GLWidget code up a bit
tidied GLWidget code up a bit

johnhaddon/gaffer,johnhaddon/gaffer,johnhaddon/gaffer,boberfly/gaffer,davidsminor/gaffer,ivanimanishi/gaffer,ivanimanishi/gaffer,davidsminor/gaffer,appleseedhq/gaffer,GafferHQ/gaffer,johnhaddon/gaffer,GafferHQ/gaffer,paulondc/gaffer,andrewkaufman/gaffer,chippey/gaffer,lucienfostier/gaffer,goddardl/gaffer,andrewkaufman/gaffer,cedriclaunay/gaffer,andrewkaufman/gaffer,GafferHQ/gaffer,hradec/gaffer,goddardl/gaffer,andrewkaufman/gaffer,cedriclaunay/gaffer,appleseedhq/gaffer,goddardl/gaffer,goddardl/gaffer,ImageEngine/gaffer,paulondc/gaffer,chippey/gaffer,paulondc/gaffer,GafferHQ/gaffer,lucienfostier/gaffer,hradec/gaffer,ImageEngine/gaffer,ImageEngine/gaffer,davidsminor/gaffer,boberfly/gaffer,chippey/gaffer,cedriclaunay/gaffer,boberfly/gaffer,lucienfostier/gaffer,paulondc/gaffer,lucienfostier/gaffer,boberfly/gaffer,hradec/gaffer,ImageEngine/gaffer,ivanimanishi/gaffer,cedriclaunay/gaffer,andrewkaufman/gaffer,johnhaddon/gaffer,davidsminor/gaffer,appleseedhq/gaffer,GafferHQ/gaffer,hradec/gaffer,chippey/gaffer,hradec/gaffer,ivanimanishi/gaffer,appleseedhq/gaffer