Defines starting with `n' in src/od-win32

• NORMAL_WINDOW_STYLE src/od-win32/win32.h:14
• NUM_DRIVES src/od-win32/win32gui.h:7
• NUM_EVILCHARS src/od-win32/fsdb_win32.c:19
• NUM_PARTS src/od-win32/win32.h:78
• NUM_URLS src/od-win32/win32gui.c:1361