[kh99]

Yeah, I think you can do:

<if condition="$foo = 1"></if>

(but then you'll probably be warned that you might not have wanted to do that).

or maybe

<if condition="($foo = 1) == 1"></if>

would get rid of any warning.

(I haven't tried these)

BTW, what's not strictly correct about the one above, just the fact that it's not initialized? If the problem is that it's not initlaized before it's used anywhere at all, then I guess the only thing you can do is initialize it in a plugin (or use some existing variable)