Variables starting with `n' in src/od-macos

• newChannel src/od-macos/mac.c:75
• nextbuf src/od-macos/sound.c:29
• next_line_double src/od-macos/mac.c:323
• next_line_pos src/od-macos/mac.c:324
• nr_joysticks src/od-macos/joystick.c:17