patch 8.2.3771: Vim9: accessing freed memory when checking type

Problem:    Vim9: accessing freed memory when checking type.
Solution:   Make a copy of a function type.

src/version.c

@@ -753,6 +753,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3771,
 /**/
     3770,
 /**/