Fix len returned for RTC parsing
Fix len returned for RTC parsing

len method as returning an (off-by 8) length in bits to the main exabgp loop,
instead of a correct length in bytes, which was resulting in a decoding error
in the case where multiple RTC routes where packed in one BGP update.

Thanks for fxpester for reporting the issue.

murat1985/bagpipe-bgp,murat1985/bagpipe-bgp