Tex and function definition

  Hello,

  I am trying to write a script that compiles a maxima batch file to a
TeX file and I have run into a weird behavior of the TeX function :

Maxima restarted.
(%i1) tex(w(u):=u);

|
w(u):=u;|
(%o1)                                FALSE
(%i2) tex(w=u);

$$w=u$$
(%o2)                                FALSE
(%i3) 

I am under debian sarge, my version of maxima is 5.9.1

   Any clue on how to make this work ?

       Cheers,

--
  Gaël