SM_ARRANGE is ARW_HIDE, i.e. 8

diff --git a/windows/sysmetrics.c b/windows/sysmetrics.c
index c397fc3..81c67da 100644
--- a/windows/sysmetrics.c
+++ b/windows/sysmetrics.c
@@ -133,7 +133,7 @@
     sysMetrics[SM_CYMENUSIZE] = sysMetrics[SM_CXMENUSIZE];
 
     /* FIXME: What do these mean? */
-    sysMetrics[SM_ARRANGE] = 8;
+    sysMetrics[SM_ARRANGE] = ARW_HIDE;
     sysMetrics[SM_CXMINIMIZED] = 160;
     sysMetrics[SM_CYMINIMIZED] = 24;