Replace C90's junk with a modest macro

src/android/i_cdmus.c

src/android/i_video.c

src/command.c

src/command.h

src/console.c

src/d_clisrv.c

src/d_netcmd.c

src/dummy/i_cdmus.c

src/dummy/i_video.c

src/filesrch.c

src/g_game.c

src/g_input.c

src/hardware/hw_main.c

src/http-mserv.c

src/m_anigif.c

src/m_cheat.c

src/m_menu.c

src/m_misc.c

src/mserv.c

src/p_mobj.c