[forms] fix form_needs_multipart implementation problem ------- The current implementation of form_needs_multipart goes down recursively in all inlined forms to check if one of them needs a multipart enctype. If we have a relation definition as X part_of X, the previous implementation potentially lead to an infinite recursion

#! /bin/sh -e
 
case "$1" in
    purge)
        rm -rf /etc/cubicweb.d/
    	rm -rf /var/run/cubicweb/
	rm -rf /var/log/cubicweb/
	rm -rf /var/lib/cubicweb/
    ;;
esac
 
#DEBHELPER#
 
exit 0