patch 8.1.1456: WinBar not redrawn after scrolling one line

Problem:    WinBar not redrawn after scrolling one line.
Solution:   Exclude the winbar height when deciding what to redraw.
            (closes #4473)
diff --git a/src/version.c b/src/version.c
index 13961d4..29006c1 100644
--- a/src/version.c
+++ b/src/version.c
@@ -768,6 +768,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1456,
+/**/
     1455,
 /**/
     1454,