Fix a call to availableLanguages() (bad object)
Fix a call to availableLanguages() (bad object)

See https://github.com/FreshRSS/FreshRSS/issues/730

FreshRSS/FreshRSS,marienfressinaud/FreshRSS,FreshRSS/FreshRSS,samuelstein/FreshRSS,Alkarex/FreshRSS,romibi/FreshRSS,samuelstein/FreshRSS,Alkarex/FreshRSS,superboum/FreshRSS,asmundg/FreshRSS,Alkarex/FreshRSS,Dolomich/FreshRSS,superboum/FreshRSS,Alkarex/FreshRSS,asmundg/FreshRSS,aledeg/FreshRSS,romibi/FreshRSS,marienfressinaud/FreshRSS,samuelstein/FreshRSS,asmundg/FreshRSS,romibi/FreshRSS,romibi/FreshRSS,FreshRSS/FreshRSS,aledeg/FreshRSS,marienfressinaud/FreshRSS,FreshRSS/FreshRSS,superboum/FreshRSS,Dolomich/FreshRSS,aledeg/FreshRSS,marienfressinaud/FreshRSS,Dolomich/FreshRSS,aledeg/FreshRSS