Make DirectX default on XP, instead of Direct3d

We did that for 2.0 temporarily but kept master normal

This is still broken on some weird configurations, so well, temporary is
going to last..

modules/video_output/msw/direct3d.c

@@ -142,6 +142,11 @@ static int Open(vlc_object_t *object)
     vout_display_t *vd = (vout_display_t *)object;
     vout_display_sys_t *sys;
 
+    OSVERSIONINFO winVer;
+    winVer.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
+    if(GetVersionEx(&winVer) && winVer.dwMajorVersion < 6 && !object->b_force)
+        return VLC_EGENERIC;
+
     /* Allocate structure */
     vd->sys = sys = calloc(1, sizeof(vout_display_sys_t));
     if (!sys)