field_error_proc spec: fix block call
field_error_proc spec: fix block call

justinfrench/formtastic,sideci-sample/sideci-sample-formtastic,thenthen8515/formtastic,Davidzhu001/formtastic,nishaya/formtastic,nishaya/formtastic,justinfrench/formtastic,Guestfolio/formtastic,mikz/formtastic,Guestfolio/formtastic,paulodiovani/formtastic,ryanfox1985/formtastic,Davidzhu001/formtastic,mikz/formtastic,Baltazore/formtastic,ConferenceCloud/formtastic,justinfrench/formtastic,ConferenceCloud/formtastic,thenthen8515/formtastic,EndingChaung/formtastic,ryanfox1985/formtastic,paulodiovani/formtastic,EndingChaung/formtastic,ryanfox1985/formtastic