Google Code-in

According to the docs, this is supposed to be an array (possibly empty) of strings, but on pages such as https://pt.wikipedia.org/wiki/Ensino:Faculdade_C%C3%A1sper_L%C3%ADbero/Ci%C3%AAncia_Pol%C3%ADtica_%28R%C3%A1dio,_TV_e_Internet%29_%282016%29 it is actually null instead of []. This caused errors in one of our gadgets (which assumed that would be defined, and tested for mw.config.get( 'wgRestrictionEdit' ).length to determine if the array was empty or not).