Fixed clang compilation failure in Dot node.
Fixed clang compilation failure in Dot node.

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