correct declarations of INode::validate overrides

Device/Beam/IFootprintFactor.h

Param/Distrib/Distributions.h

Sample/Aggregate/ParticleLayout.h

Sample/Correlations/Profiles1D.h

Sample/Correlations/Profiles2D.h

Sample/HardParticle/Bipyramid4.h

Sample/HardParticle/Box.h

Sample/HardParticle/CantellatedCube.h

Sample/HardParticle/Cone.h

Sample/HardParticle/Cylinder.h

Sample/HardParticle/Dodecahedron.h

Sample/HardParticle/EllipsoidalCylinder.h

Sample/HardParticle/HemiEllipsoid.h

Sample/HardParticle/HollowSphere.h

Sample/HardParticle/HorizontalCylinder.h

Sample/HardParticle/Icosahedron.h

Sample/HardParticle/LongBoxGauss.h

Sample/HardParticle/LongBoxLorentz.h

Sample/HardParticle/PlatonicOctahedron.h

Sample/HardParticle/PlatonicTetrahedron.h