commited Christian Ehrlicher's patch fixing a buffer overrun in find_usb_devices.


git-svn-id: https://svn.code.sf.net/p/spacenav/code/@173 ef983eb1-d774-4af8-acfd-baaf7b16a646
fixed C++ comment in dev_usb_darwin.c and silenced gcc's nagging for empty files


git-svn-id: https://svn.code.sf.net/p/spacenav/code/@174 ef983eb1-d774-4af8-acfd-baaf7b16a646