To be used with llist_fn_match_t callbacks later.
I feel a bit ill adding those functions. This definitely is a hack.
Ultimately, there should be some generic recur_item_inday() function
that accepts both recurring apointments and events (or some wrapper
structure) instead of parameter galeere. This is not the right place to
fix that tho.
Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>