[browser2] fix bug in is_here when self.klass is None
[browser2] fix bug in is_here when self.klass is None

frankrousseau/weboob,RouxRC/weboob,nojhan/weboob-devel,laurent-george/weboob,nojhan/weboob-devel,laurent-george/weboob,Boussadia/weboob,sputnick-dev/weboob,frankrousseau/weboob,willprice/weboob,frankrousseau/weboob,Boussadia/weboob,Konubinix/weboob,sputnick-dev/weboob,laurent-george/weboob,willprice/weboob,sputnick-dev/weboob,RouxRC/weboob,RouxRC/weboob,Konubinix/weboob,Boussadia/weboob,nojhan/weboob-devel,Boussadia/weboob,willprice/weboob,Konubinix/weboob