patch 8.2.5094: MS-Windows GUI: empty command may cause a dialog

Problem:    MS-Windows GUI: empty command may cause a dialog.
Solution:   Delete the dialog file.  Improve the message.
diff --git a/src/version.c b/src/version.c
index 50c6ed3..fb9f794 100644
--- a/src/version.c
+++ b/src/version.c
@@ -735,6 +735,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    5094,
+/**/
     5093,
 /**/
     5092,