fcup-smsend[mult]: fix buglet in K&R C NULL pointer passing The only 100% safe way to pass a NULL pointer as a function argument in K&R C is to cast 0 to a pointer type; failing to do so may cause mysterious bugs (invalid stack frames or garbage in argument registers) on 64-bit machines. This issue has already been fixed in most of FC host tools, but I just found some missed spots: passing of NULL UDH to PDU encoding functions in fcup-smsend[mult] in the case of single (not concatenated) SMS.

/*
 * Commands which don't belong anywhere else
 */

#include <sys/types.h>
#include <stdio.h>
#include <string.h>
#include <strings.h>
#include <stdlib.h>
#include "pktmux.h"
#include "etm.h"
#include "tmffs1.h"

cmd_check_ffs1(argc, argv)
	char **argv;
{
	u_char cmdpkt[5];

	cmdpkt[1] = ETM_FFS1;
	cmdpkt[2] = FPI_TMFFS_VERSION;
	cmdpkt[3] = FPI_END;
	send_etm_cmd(cmdpkt, 3);
	return(0);
}