Macro for unused arguments

inc/common/common.h

meson.build

src/commands.c

src/common.c

src/config.c

src/main/lkt.c

src/main/lktadm.c

src/module/module_sdl2.c

src/module/module_x11.c

src/mthread/mthread_cond.c

src/mthread/mthread_debug.c

src/mthread/mthread_key.c

src/mthread/mthread_mutex.c

src/mthread/mthread_once.c

src/mthread/mthread_sem.c

src/mthread/mthread_tst.c

src/repo/sync.c