remove main loop check
remove main loop check

Mozilla 3 handles the main loop differently, so this check fails there.
Since it was only supposed to help ensure a main loop is running and didn't
have a vital function otherwise, we can just remove it.

freedesktop-unofficial-mirror/swfdec__swfdec-mozilla,freedesktop-unofficial-mirror/swfdec__swfdec-mozilla,freedesktop-unofficial-mirror/swfdec__swfdec-mozilla