patch 9.0.0780: 'scroll' value computed in unexpected location

Problem:    'scroll' value computed in unexpected location.
Solution:   Compute 'scroll' when the window height is changed. (Luuk van
            Baal, closes #11387)
diff --git a/src/version.c b/src/version.c
index b872e3f..947f653 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    780,
+/**/
     779,
 /**/
     778,