patch 7.4.1442
Problem:    MS-Windows: more compilation warnings for destructor.
Solution:   Add "virtual". (Ken Takata)
diff --git a/src/version.c b/src/version.c
index 505d170..a1e5442 100644
--- a/src/version.c
+++ b/src/version.c
@@ -744,6 +744,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1442,
+/**/
     1441,
 /**/
     1440,