Retrieves a pointer to the current contents of a Text actor.
If you need a copy of the contents for manipulating, either use strdup on the returned string, or use:
copy = clutter_text_get_chars (text, 0, -1);
Which will return a newly allocated string.
If the Text actor is empty, this function will return an empty string, and not
the contents of the actor. The returned string is owned by the Text actor and should never be modified or freed