updated for version 7.4.491
Problem:    When winrestview() has a negative "topline" value there are
            display errors.
Solution:   Correct a negative value to 1. (Hirohito Higashi)
diff --git a/src/version.c b/src/version.c
index 3fc09c8..71258da 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    491,
+/**/
     490,
 /**/
     489,