Free network_info on clear

tsfuncs_nit.c

 	struct ts_nit_stream **streams = nit->streams;
 	int streams_max = nit->streams_max;
 	// free
+	FREE(nit->network_info);
 	ts_nit_streams_data_free(nit);
 	// clear
 	ts_section_data_clear(section_header);