patch 9.0.1614: strlen() called too often for :spellrepall

Problem:    strlen() called too often for :spellrepall.
Solution:   Store the result in a variable. (closes #12497)
diff --git a/src/version.c b/src/version.c
index 466209b..b20685a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1614,
+/**/
     1613,
 /**/
     1612,