Typedefs starting with `c' in linuxdoom

• card_t src/doomdef.h:173
• castinfo_t src/f_finale.c:338
• ceiling_e src/p_spec.h:489
• ceiling_t src/p_spec.h:510
• channel_t src/s_sound.c:104
• cheat_t src/d_player.h:77
• cliprange_t src/r_bsp.c:85
• column_t src/r_defs.h:290