Use -1 as file descriptor "not open" value instead of 0
[debian/gnuradio] / gr-usrp2 /
drwxr-xr-x   ..
-rw-r--r-- 42 .gitignore
-rw-r--r-- 927 Makefile.am
-rw-r--r-- 303 gnuradio-usrp2.pc.in
drwxr-xr-x - src