updated for version 7.4.456
Problem:    'backupcopy' is global, cannot write only some files in a
            different way.
Solution:   Make 'backupcopy' global-local. (Christian Brabandt)
diff --git a/src/version.c b/src/version.c
index 9083083..50639fd 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    456,
+/**/
     455,
 /**/
     454,