patch 8.2.4539: when comparing special v:none and v:null are handled the same

Problem:    When comparing special v:none and v:null are handled the same when
            compiling.
Solution:   Pass more information so that v:none can be handled differently at
            compile time.  (issue #9923)
diff --git a/src/version.c b/src/version.c
index 48f2f01..b744932 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4539,
+/**/
     4538,
 /**/
     4537,