[dev] scry bug

[Duck]

If someone submits the poll without selecting an answer, it won't rerender the 
form again. 

Insted of redraw the radio bottons, it outputs "Warning: Invalid argument 
supplied for foreach() in /usr/lib/php/Horde/UI/VarRenderer/html.php on line 
1019" --- as in screenshot attached (CVS from 11.6.04)

Duck
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