Typedefs starting with `p' in hexen

• pcx_t src/m_misc.c:751
• phase_t src/p_spec.h:112
• pillar_t src/p_spec.h:417
• plat_e src/p_spec.h:240
• plat_t src/p_spec.h:267
• plattype_e src/p_spec.h:251
• polyblock_t src/r_local.h:166
• polyobj_t src/r_local.h:159