patch 8.2.1083: crash when using reduce() on a NULL list

Problem:    Crash when using reduce() on a NULL list.
Solution:   Only access the list when not NULL.

src/version.c

@@ -754,6 +754,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1083,
 /**/
     1082,
 /**/