extra check for not setting the same exception page twice if exception page is the one that errors
extra check for not setting the same exception page twice if exception page is the one that errors


git-svn-id: ac804e38dcddf5e42ac850d29d9218b7df6087b7@457272 13f79535-47bb-0310-9956-ffa450edef68

bitstorm/wicket,AlienQueen/wicket,Servoy/wicket,mafulafunk/wicket,klopfdreh/wicket,freiheit-com/wicket,selckin/wicket,aldaris/wicket,martin-g/wicket-osgi,zwsong/wicket,selckin/wicket,apache/wicket,klopfdreh/wicket,dashorst/wicket,freiheit-com/wicket,AlienQueen/wicket,Servoy/wicket,bitstorm/wicket,astrapi69/wicket,mosoft521/wicket,bitstorm/wicket,apache/wicket,aldaris/wicket,apache/wicket,aldaris/wicket,topicusonderwijs/wicket,aldaris/wicket,dashorst/wicket,topicusonderwijs/wicket,astrapi69/wicket,dashorst/wicket,zwsong/wicket,martin-g/wicket-osgi,mosoft521/wicket,aldaris/wicket,astrapi69/wicket,Servoy/wicket,AlienQueen/wicket,selckin/wicket,mosoft521/wicket,mosoft521/wicket,Servoy/wicket,klopfdreh/wicket,mafulafunk/wicket,zwsong/wicket,topicusonderwijs/wicket,klopfdreh/wicket,selckin/wicket,freiheit-com/wicket,dashorst/wicket,klopfdreh/wicket,Servoy/wicket,AlienQueen/wicket,bitstorm/wicket,zwsong/wicket,bitstorm/wicket,astrapi69/wicket,selckin/wicket,topicusonderwijs/wicket,topicusonderwijs/wicket,mafulafunk/wicket,dashorst/wicket,freiheit-com/wicket,AlienQueen/wicket,mosoft521/wicket,freiheit-com/wicket,apache/wicket,martin-g/wicket-osgi,apache/wicket