Add NULLIF to avoid division by zero
Add NULLIF to avoid division by zero

jaywink/the-federation.info,jaywink/the-federation.info,Flaburgan/diaspora-hub,Flaburgan/the-federation.info,jaywink/diaspora-hub,jaywink/diaspora-hub,Flaburgan/the-federation.info,Flaburgan/diaspora-hub,jaywink/the-federation.info,Flaburgan/the-federation.info,Flaburgan/the-federation.info,Flaburgan/diaspora-hub,jaywink/diaspora-hub