patch 8.2.4449: vim9: function argument of sort() not checked at compile time

Problem:    vim9: function argument of sort() not checked at compile time.
Solution:   Add a compile time check.

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    4449,
 /**/
     4448,
 /**/