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
OBJS=	alpha_addr.o decode_helpers.o grokdcs.o gsm7_decode.o \
	gsm7_decode_qstring.o gsm7_decode_tables.o gsm7_encode.o \
	gsm7_encode_table.o gsm7_pack.o gsm7_unpack.o gsmtime.o hexdecode.o \
	hexdump.o hexencode.o number_decode.o number_encode.o scaddr.o \
	sms_submit.o sms_submit8.o ucs2_bigend.o ucs2_decode.o utf8_decode.o \
	utf8_decode2.o
LIB=	libcoding.a

all:	${LIB}

${LIB}:	${OBJS}
	ar rcu $@ ${OBJS}
	ranlib $@

clean:
	rm -f *.[oa] errs