cyaml_json() is missing commas between sequence items

[yasuoka]

cyaml_json() does not emit commas between sequence items when generating JSON.

test code:

#include <cyaml.h>
#include <stdio.h>

int
main(int argc, char *argv[])
{
	cyaml_doc_t	*doc;
	cyaml_node_t	*root, *test;

	doc = cyaml_doc_new();
	root = cyaml_new_map(doc);
	test = cyaml_new_seq(doc);
	cyaml_seq_push(test, cyaml_new_int(doc, 1));
	cyaml_seq_push(test, cyaml_new_int(doc, 2));
	cyaml_seq_push(test, cyaml_new_int(doc, 3));
	cyaml_seq_push(test, cyaml_new_int(doc, 4));
	cyaml_map_set(doc, root, "test", test);
	cyaml_set_root(doc, root);

	printf("%s", cyaml_json(doc, 2, NULL));	
}

result:

% ./a.out
{
  "test": [
    1    2    3    4
  ]
}
%

comma (,) is missing between items.

after the diff:

% ./a.out
{
  "test": [
    1,
    2,
    3,
    4
  ]
}
%