patch 7.4.1428
Problem:    Compiler warning for non-virtual destructor.
Solution:   Make it virtual. (Yasuhiro Matsumoto)
diff --git a/src/version.c b/src/version.c
index 359d8df..68ccf92 100644
--- a/src/version.c
+++ b/src/version.c
@@ -749,6 +749,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1428,
+/**/
     1427,
 /**/
     1426,