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
PROGDIR=atcmd atinterf sms-pdu-decode
LIBDIR=	libcoding
SUBDIR=	${PROGDIR} ${LIBDIR}

INSTALL_PREFIX=	/opt/freecalypso

all:	${SUBDIR}

atcmd:		libcoding
sms-pdu-decode:	libcoding

${SUBDIR}: FRC
	cd $@; ${MAKE} ${MFLAGS} CC=${CC} CFLAGS="${CFLAGS}"

clean: FRC
	rm -f a.out core errs
	for i in ${SUBDIR}; do (cd $$i; ${MAKE} ${MFLAGS} clean); done

install: FRC
	for i in ${PROGDIR}; do (cd $$i; ${MAKE} ${MFLAGS} \
		INSTALL_PREFIX=${INSTALL_PREFIX} install); done

FRC: