detecting end of array of pointers, given by gmarkup

[Kang Jeong-Hee <Keizi mail co kr>]

Hi.

the gmarkup's start element handler given 3 arguments with a tag;
gchar *element_name, gchararray *attribute_names, *_values;

how can I check the inside of gchararray *var?
I tried while (var != NULL) loop but failed to stop at the edge.

or as a convenient way, give one more argument; gint attrivute_len;
it would help to detect edge of gchararray *var.

thanks.