Skip to end of search_autocomplete_autocomplete() when views_get_view()

In search_autocomplete_autocomplete(), sometimes views_get_view() returns NULL, which leads to the error "PHP Fatal error: Call to a member function set_display() on null". This can be fixed by moving the method_exists() conditional to right after the call to views_get_view().

(Why is views_get_view() called twice with the same parameter?)