patch 8.0.1769: repeated saving and restoring viewstate for 'incsearch'

Problem:    Repeated saving and restoring viewstate for 'incsearch'.
Solution:   Use a structure.
diff --git a/src/version.c b/src/version.c
index 773e4b4..0a36b66 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1769,
+/**/
     1768,
 /**/
     1767,