Typedefs starting with `v' in hexen

• vertex_t src/r_local.h:56
• visplane_t src/r_local.h:210
• vissprite_t src/r_local.h:250
• vldoor_e src/p_spec.h:295
• vldoor_t src/p_spec.h:307
• void src/h2def.h:262