Fixed, thanks.

Patch to fix 0 == false error.

I came across a problem where using the 'prompt' => true option for 
enum Form types where if you submitted a form, and "-- select --" was 
highlighted, when the form came back, the first viable option was 
selected, rather than still being "-- select --"



The hard part was that it sometimes worked, and othertimes didn't, but 
it came down to a logic error.  Basically if the $values array 
contained a "0", it thought that the var was selected because in php 
'false' == 0, so I had to do a === to get it to work right.



It'll make more sense once you see the patch.



Thanks.