patch 8.2.4308: Vim9: cannot list autoload function

Problem:    Vim9: cannot list autoload function.
Solution:   Don't give an error for using # when listing a function.
            (closes #9703)

src/testdir/test_vim9_import.vim

@@ -1886,6 +1886,10 @@ def Test_vim9script_autoload_call()
       assert_equal('other', g:result)
 
       assert_equal('arg', call('another.RetArg', ['arg']))
+
+      verbose function another.Getother
+      # should we disallow this?
+      verbose function another#Getother
   END
   v9.CheckScriptSuccess(lines)
 

src/userfunc.c

@@ -4232,7 +4232,7 @@ define_function(exarg_T *eap, char_u *name_arg, garray_T *lines_to_free)
 		name = prefixed;
 	    }
 	}
-	else if (vim9script && name != NULL
+	else if (paren && vim9script && name != NULL
 				    && vim_strchr(name, AUTOLOAD_CHAR) != NULL)
 	{
 	    emsg(_(e_cannot_use_name_with_hash_in_vim9_script_use_export_instead));

src/version.c

@@ -746,6 +746,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    4308,
 /**/
     4307,
 /**/