Don't bold first use of title if zeroth section of page uses <dfn> tag (for fr-wiki)

https://en.wikipedia.org/wiki/Wikipedia_talk:AutoWikiBrowser/Bugs#Bold_and_element

git-svn-id: svn://svn.code.sf.net/p/autowikibrowser/code@10488 5227b50d-9349-4574-b055-4b0a7525e11c