GafferSceneUI/StandardLightVisualiser::faceCameraVertexSource : Fix case where camera is aligned to light
GafferSceneUI/StandardLightVisualiser::faceCameraVertexSource : Fix case where camera is aligned to light

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