g_slist_foreach and single arg functions

[Mike <logan dct com>]

Heya,

I've seen a number of applications and libraries such as pango using g_slist_foreach(list, (GFunc) g_free, NULL); and other single argument functions.

GFunc is typed out to two args, and g_slist_foreach calls the passed function with two args (eg. g_free(list->data, NULL)). This works, but is it proper c? Would some compilers complain?

Thanks,

Mike