patch 8.2.4740: when expand() fails there is no error message

Problem:    When expand() fails there is no error message.
Solution:   When 'verbose' is set give an error message.
diff --git a/src/version.c b/src/version.c
index 84c669b..5ef4e74 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4740,
+/**/
     4739,
 /**/
     4738,