mgw: accept zero-length RTP payload as BFI Mainline OsmoBTS now has an option (rtp continuous-streaming) that causes it to emit an RTP packet every 20 ms without gaps, sending a BFI marker in the form of zero-length RTP payload when it has nothing else to send. These codec-independent BFI markers don't indicate TAF, but this provision is a good start. Accept this BFI packet format in themwi-mgw.

CC=	gcc
CFLAGS=	-O2
OBJS=	bitfunc.o crc8gen.o dtmf_valid.o extdigits.o imsi_entry.o mncc_debug.o \
	mncc_utils.o nanp_valid.o numstring.o sockinit.o tfo_msg_enc.o
LIB=	libutil.a

all:	${LIB}

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

clean:
	rm -f *.[oa] errs