fod_lexer.rl: suppress '-Wswitch-default' and '-Wsign-conversion'
fod_lexer.rl: suppress '-Wswitch-default' and '-Wsign-conversion'

Signed-off-by: Pavel Kretov <7cae407f1f3b56350827d1394be40a3e8f9cb303@gmail.com>

firegurafiku/opencl-device-lookup