Remove invalid assertion -- </form> may occur in input data before any <form> is encountered.
Remove invalid assertion -- </form> may occur in input data before any <form> is encountered.

svn path=/trunk/hubbub/; revision=4541

Achal-Aggarwal/hibbub,prepare/netsurf_libhubbub,Achal-Aggarwal/hibbub,adamwight/wmf-parsoid-libhubbub,adamwight/wmf-parsoid-libhubbub,servo/libhubbub,adamwight/wmf-parsoid-libhubbub,servo/libhubbub,Achal-Aggarwal/hibbub,servo/libhubbub,servo/libhubbub,Achal-Aggarwal/hibbub,prepare/netsurf_libhubbub,adamwight/wmf-parsoid-libhubbub,adamwight/wmf-parsoid-libhubbub,prepare/netsurf_libhubbub,prepare/netsurf_libhubbub,servo/libhubbub,prepare/netsurf_libhubbub,prepare/netsurf_libhubbub