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=	abbcmd.o buzzer.o cmdentry.o defgetchar.o dispatch.o hexarg.o \
	hexstrings.o parseargs.o uartsel.o cmd_baud_switch.o cmd_crc32.o \
	cmd_dieid.o cmd_jump.o cmd_r8.o cmd_r16.o cmd_r32.o cmd_w8.o cmd_w16.o \
	cmd_w32.o cmd_memdump_human.o cmd_memdump_machine.o

all:	libcommon.a

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

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