patch 8.2.1980: Vim9: some tests are not done at the script level

Problem:    Vim9: some tests are not done at the script level.
Solution:   Use CheckDefAndScriptSuccess() in more places.  Fix uncovered
            problems.

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1980,
 /**/
     1979,
 /**/