sysutils/tiramisu: unbreak build with clang 16

src/notification.vala.c:580:31: error: incompatible function pointer types passing 'void (gconstpointer, gconstpointer, gpointer)' (aka 'void (const void *, const void *, void *)') to parameter of type 'GHFunc' (aka 'void (*)(void *, void *, void *)') [-Wincompatible-function-pointer-types]

g_hash_table_foreach (hints, ___lambda4__gh_func, _data1_);
                             ^~~~~~~~~~~~~~~~~~~

/usr/local/include/glib-2.0/glib/ghash.h:114:61: note: passing argument to parameter 'func' here

GHFunc          func,
                ^

src/notification.vala.c:747:31: error: incompatible function pointer types passing 'void (gconstpointer, gconstpointer, gpointer)' (aka 'void (const void *, const void *, void *)') to parameter of type 'GHFunc' (aka 'void (*)(void *, void *, void *)') [-Wincompatible-function-pointer-types]

g_hash_table_foreach (hints, ___lambda5__gh_func, _data2_);
                             ^~~~~~~~~~~~~~~~~~~

/usr/local/include/glib-2.0/glib/ghash.h:114:61: note: passing argument to parameter 'func' here

GHFunc          func,
                ^

Reported by: pkg-fallout