radiobuttons emitting signal twice

[RvdKorput <gtkverden gmail com>]

Hi guys,

Im currently encountering a problem with radiobuttons. On all of the 
buttons in a group I want to have a action. Now the problem is that when 
a radiobutton is selected, the previous selected one emits a signal and 
the new one. I only want a signal from the new selected one.

I'm currently using the singal_toggled. Is there some other one i should 
use to not have this problem?

Roy vd Korput