Don't use lgi_enter_func if not found
Don't use lgi_enter_func if not found

Prevents segfault when using an old LGI version.

chergert/libpeas,gregier/libpeas,GNOME/libpeas,chergert/libpeas,Distrotech/libpeas,gregier/libpeas,Distrotech/libpeas,chergert/libpeas,GNOME/libpeas,Distrotech/libpeas,gregier/libpeas,gregier/libpeas