patch 8.2.1251: Vim9: warning for pointer usage, test failure undetected

Problem:    Vim9: warning for pointer usage, test failure undetected.
Solution:   Fix pointer indirection.  Give error when executing function
            failed for any reason.  Fix instruction names.
diff --git a/src/version.c b/src/version.c
index 936e4df..444870e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1251,
+/**/
     1250,
 /**/
     1249,