Silence warning

menu/menu_navigation.c

@@ -257,6 +257,6 @@ void menu_navigation_ascend_alphabet(menu_navigation_t *nav, size_t *ptr_out)
 size_t menu_navigation_get_selection(menu_navigation_t *nav)
 {
    if (!nav)
-      return -1;
+      return 0;
    return nav->selection_ptr;
 }