patch 8.2.2391: memory leak when creating a global function with closure

Problem:    Memory leak when creating a global function with closure.
Solution:   Create a separate partial for every instantiated function.

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2391,
 /**/
     2390,
 /**/