Defines starting with `v' in quakeworld

• val quakeworld/client/math.s:40
• VERSION quakeworld/client/bothdefs.h:24
• VERTEXSIZE quakeworld/client/gl_model.h:117
• VID_CBITS quakeworld/client/vid.h:22
• VID_GRADES quakeworld/client/vid.h:23
• VID_ROW_SIZE quakeworld/client/gl_vidnt.c:28
• viewentity quakeworld/client/snd_dma.c:36