patch 8.1.1485: double free when garbage_collect() is used in autocommand

Problem:    Double free when garbage_collect() is used in autocommand.
Solution:   Have garbage collection also set the copyID in funccal_stack.

src/version.c

@@ -767,6 +767,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1485,
 /**/
     1484,
 /**/