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.
diff --git a/src/version.c b/src/version.c
index 9806b91..2ffa111 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1083,
+/**/
     1082,
 /**/
     1081,