Strict warning: Only variables should be passed by reference in Open Restaurant
drupal_render takes reference. taxonomy_term_view($term, $view_mode) is not a variable, so you shouldn't use it in places where reference is needed - because if something takes reference, it will try to update what it got, and it's impossible with a function. So to fix this, you need to create variable, then store result of taxonomy_term_view in it, and pass that variable to drupal_render.

Then, create patch file nd post it in their issue queue for everybody to see.