comctl32: Implement LM_GETIDEALSIZE for the syslink control.
diff --git a/include/commctrl.h b/include/commctrl.h
index 1415a30..3225e1b 100644
--- a/include/commctrl.h
+++ b/include/commctrl.h
@@ -4889,6 +4889,7 @@
 /* SysLink messages */
 #define LM_HITTEST           (WM_USER + 768)
 #define LM_GETIDEALHEIGHT    (WM_USER + 769)
+#define LM_GETIDEALSIZE      (LM_GETIDEALHEIGHT)
 #define LM_SETITEM           (WM_USER + 770)
 #define LM_GETITEM           (WM_USER + 771)