PmForm: template require field if=condition

Is anyone using a PmForm template with the argument if=condition?

   (:template require field if="condition" errmsg="Invalid field":)

I need to add a server-side email validation for email fields, that 
would look like this:

   (:template require email if=validemail errmsg="Invalid email":)

In order to do this, I need to change a line of code. The way it has 
been documented for years doesn't work. Contrary to the documentation, 
the if= condition doesn't check the posted input.

My change would make it work as documented, but it might possibly break 
existing PmForms that use it in an unintended way.

I have now added this change to Subversion, you can get the nightly 
version or the changes from the page ChangeLog.

If you have PmForms that rely on the old behavior, please let me know so 
that we can either find a workaround, or revert the latest changes.

Petko

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