ImageGadget : Fix compilation with Clang
ImageGadget : Fix compilation with Clang

hradec/gaffer,GafferHQ/gaffer,andrewkaufman/gaffer,hradec/gaffer,andrewkaufman/gaffer,GafferHQ/gaffer,hradec/gaffer,hradec/gaffer,andrewkaufman/gaffer,johnhaddon/gaffer,andrewkaufman/gaffer,johnhaddon/gaffer,ImageEngine/gaffer,GafferHQ/gaffer,hradec/gaffer,GafferHQ/gaffer,GafferHQ/gaffer,andrewkaufman/gaffer,johnhaddon/gaffer,johnhaddon/gaffer,ImageEngine/gaffer,ImageEngine/gaffer,ImageEngine/gaffer,johnhaddon/gaffer