patch 8.2.0429: no warning when test checks for option that never exists

Problem:    No warning when test checks for option that never exists.
Solution:   In tests check that the option can exist.
diff --git a/src/version.c b/src/version.c
index e27b773..17918de 100644
--- a/src/version.c
+++ b/src/version.c
@@ -739,6 +739,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    429,
+/**/
     428,
 /**/
     427,