Fixed compilation without NDEBUG=1 with gcc 4.1.2.
Fixed compilation without NDEBUG=1 with gcc 4.1.2.

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