Typedefs starting with `f' in jagdoom

• faces_e src/st_main.h:59
• faces_t src/in_main.c:42
• final_e src/f_main.c:129
• fixed_t src/doomdef.h:79
• floor_e src/p_spec.h:327
• floormove_t src/p_spec.h:340