patch 8.1.1292: invalid command line arguments not tested

Problem:    Invalid command line arguments not tested.
Solution:   Add a test. (Dominique Pelle, closes #4346)
diff --git a/src/version.c b/src/version.c
index 09bb1be..5eeec1c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -768,6 +768,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1292,
+/**/
     1291,
 /**/
     1290,