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=	arm-elf-gcc
CFLAGS=	-Os -fno-builtin
CPPFLAGS=-I../include
AR=	arm-elf-ar
RANLIB=	arm-elf-ranlib

OBJS=	abbdrv.o osmodelay.o serio.o spidrv.o waitarm.o

all:	libbase.a

libbase.a:	${OBJS}
	${AR} cru $@ ${OBJS}
	${RANLIB} $@

clean:
	rm -f *.[oa] *errs