patch 8.2.4586: Vim9: no error for using lower case name for "func" argument

Problem:    Vim9: no error for using lower case name for "func" argument.
            (Ernie Rael)
Solution:   Check the name as soon as the type is known.

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    4586,
 /**/
     4585,
 /**/