patch 8.2.1798: Vim9: trinary operator condition is too permissive

Problem:    Vim9: trinary operator condition is too permissive.
Solution:   Use tv_get_bool_chk().
diff --git a/src/version.c b/src/version.c
index 914e4f0..58eb3d6 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1798,
+/**/
     1797,
 /**/
     1796,