fixed bug: in a subform, if show_blank_record is false, the last association would not be removable because the  params[:record][attr] wouldn't exist. it's a problem like with unchecked checkboxes, and the solution is similar.
fixed bug: in a subform, if show_blank_record is false, the last association would not be removable because the 
params[:record][attr] wouldn't exist. it's a problem like with unchecked checkboxes, and the solution is similar.

PiRSquared17/activescaffold,PiRSquared17/activescaffold,PiRSquared17/activescaffold