updated for version 7.4.499
Problem:    substitute() can be slow with long strings.
Solution:   Store a pointer to the end, instead of calling strlen() every
            time. (Ozaki Kiichi)
diff --git a/src/version.c b/src/version.c
index ae1a56b..9008518 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    499,
+/**/
     498,
 /**/
     497,