patch 8.0.1425: execute() does not work in completion of user command

Problem:    execute() does not work in completion of user command. (thinca)
Solution:   Switch off redir_off and restore it. (Ozaki Kiichi, closes #2492)
diff --git a/src/version.c b/src/version.c
index 4f8dfd2..f62287b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -772,6 +772,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1425,
+/**/
     1424,
 /**/
     1423,