retina_enabled is set to the value of the RetinaEnabled registry key, and retina_on is TRUE when: retina_enabled is TRUE, and the display mode has not changed since Wine was launched.
retina_on was being set (indirectly) by check_retina_status(), but it relies on retina_on itself. (check_retina_status() -> create_original_display_mode_descriptor() -> init_original_display_mode() -> macdrv_get_displays() -> cgrect_win_from_mac() which accesses retina_on)
This resulted in incorrect (non-retina) monitor and work RECTs being cached, causing odd application bugs like a window that won't resize larger than 1/4 of the screen.
Initialize retina_on to the value of retina_enabled, so later calls to check_retina_status() don't result in incorrect data being cached.