Would be bad for cryonics. Assisted suicide opponents would scream "Cryonics gives people false hope so they can kill themselves!". People with bad but solvable problems would be more likely to choose suicide + cryo, as opposed to solving their problems (also as opposed to regular suicide, so it's unsure which is sadder - but the opposition would see the extra expected deaths more than the prevented ones).
But then assisted suicide proponents could scream "See, it's doesn't have to actually be suicide. It can be turned into a futuristic medical treatment.". Also, it's possible that attitudes toward assisted suicide and potential attitudes towards cryonics are correlated -- people who are strongly against assisted suicide would oppose cryonics anyway so associating the concepts wouldn't hurt cryonics that much.
Besides, there's always the option of arranging cryosuspension discreetly and avoid any PR implications. Or isn't that feasible at all?
http://blastr.com/2011/06/terry-pratchett-begins-fo.php
Another great mind that will be needlessly lost forever. :(