patch 9.0.1279: display shows lines scrolled down erroneously

Problem:    Display shows lines scrolled down erroneously. (Yishai Lerner)
Solution:   Do not change "wl_lnum" at index zero. (closes #11938)
diff --git a/src/version.c b/src/version.c
index f21013d..2e5b932 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1279,
+/**/
     1278,
 /**/
     1277,