Use -1 as file descriptor "not open" value instead of 0
[debian/gnuradio] / usrp / fpga / rbf /
drwxr-xr-x   ..
-rw-r--r-- 63 .gitignore
-rw-r--r-- 818 Makefile.am
drwxr-xr-x - rev2
drwxr-xr-x - rev4