Typedefs starting with `p' in djgppdoom

• patch_t src/r_defs.h:363
• pcx_t src/m_misc.c:436
• plat_e src/p_spec.h:270
• plat_t src/p_spec.h:301
• plattype_e src/p_spec.h:282
• player_t src/d_player.h:167
• point_t src/wi_stuff.c:127
• post_t src/r_defs.h:288
• powerduration_t src/doomdef.h:241
• powertype_t src/doomdef.h:225
• pspdef_t src/p_pspr.h:76