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)

src/version.c

@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1614,
 /**/
     1613,
 /**/