func os/user._C_gr_gid

2 uses

	os/user (current package)
		cgo_lookup_unix.go#L137: 		Gid:  strconv.Itoa(int(_C_gr_gid(grp))),
		cgo_lookup_cgo.go#L81: func _C_gr_gid(g *_C_struct_group) _C_gid_t  { return g.gr_gid }