Typedefs starting with `m' in djgppdoom

• maplinedef_t src/doomdata.h:94
• mapseg_t src/doomdata.h:172
• mapsidedef_t src/doomdata.h:79
• mapsubsector_t src/doomdata.h:159
• maptexture_t src/r_data.c:94
• mapvertex_t src/doomdata.h:65
• mline_t src/am_map.c:148
• mobjinfo_t src/info.h:1332
• mobjtype_t src/info.h:1304
• mpoint_t src/am_map.c:143
• musicenum_t src/sounds.h:171
• musicinfo_t src/sounds.h:85