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.

/*
 * Our mokoffs and pirffs wrappers exec the main tiffs binary; in order
 * to do it efficiently without execvp etc, we hard-code the pathname
 * where that binary is installed.
 */

char tiffs_prog_pathname[] = "/opt/freecalypso/bin/tiffs";