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)

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    4539,
 /**/
     4538,
 /**/