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.

CC=	gcc
CFLAGS=	-O2
PROGS=	rvtdump
XPROGS=	etmsend
INSTBIN=/usr/local/bin

RVTDUMP_OBJS=	log.o openport.o packetrx.o packettx.o rvtdump.o rvtdump_tx.o \
		trdump.o

all:	${PROGS} ${XPROGS}

rvtdump:	${RVTDUMP_OBJS}
	${CC} ${CFLAGS} -o $@ ${RVTDUMP_OBJS}

etmsend:	etmsend.c
	${CC} ${CFLAGS} -o $@ $@.c

install:	${PROGS}
	mkdir -p ${INSTBIN}
	install -c ${PROGS} ${INSTBIN}

clean:
	rm -f *.o *.out *errs ${PROGS} ${XPROGS}