Use -1 as file descriptor "not open" value instead of 0
[debian/gnuradio] / gnuradio-examples /
drwxr-xr-x   ..
-rw-r--r-- 252 .gitignore
-rw-r--r-- 889 Makefile.am
drwxr-xr-x - c++
drwxr-xr-x - grc
drwxr-xr-x - python