fixed MATERIAL print in vtk for salome
fixed MATERIAL print in vtk for salome

eaulisa/MyFEMuS,coyigg/Femus_Dr_Aulisa_Project,FeMTTU/femus,giorgiobornia/femus,saikanth88/femus,giorgiobornia/femus,femus-hierarchical/femus,coyigg/Femus_Dr_Aulisa_Project,eaulisa/MyFEMuS,sureka19/femus,giorgiobornia/femus,saikanth88/femus,sureka19/femus,saikanth88/femus,saikanth88/femus,FeMTTU/femus,FeMTTU/femus,femus-hierarchical/femus,eaulisa/MyFEMuS,giorgiobornia/femus,FeMTTU/femus