hackrf_transfer doesn't quit at end #11

Hi,

It was suggested I use your branch to get around a issue, however I've now hit another one. If I run the command:

hackrf_transfer -S4294967296 -a 1 -l 32 -s 10000000 -n3000000000 -b 9000000 -f $498000000 -g 2 -r t1.iq8

I get a filesize of: 5999996928 and the program just hangs until I hit control-c (at which point the missing 3072 bytes are transferred). This is different behaviour from the stock hackrf_transfer which will exit after doing all 3000000000 samples.

This is on linux (debian unstable) on an i7 writing to a SSD (if that makes any difference).

Thanks,

Matt