Makefile.mingw corrections and made the code pass much stricter checks (now mandated by Makefile.mignw) to ensure GCC 14 readiness.

src/video/vid_ogc.c

@@ -535,7 +535,7 @@ ogc_speed_changed(void *priv)
 }
 
 void
-ogc_mdaattr_rebuild()
+ogc_mdaattr_rebuild(void)
 {
     int c;