patch 8.2.1396: Vim9: no error for unexpectedly returning a value

Problem:    Vim9: no error for unexpectedly returning a value.
Solution:   Only set the return type for lambda's.  Make using function type
            in a function reference work.

src/version.c

@@ -754,6 +754,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1396,
 /**/
     1395,
 /**/