patch 8.0.1339: no test for what 8.0.1335 fixes

Problem:    No test for what 8.0.1335 fixes.
Solution:   Add a test. (Yasuhiro Matsumoto, closes #2373)
diff --git a/src/version.c b/src/version.c
index 8cce078..32c83c8 100644
--- a/src/version.c
+++ b/src/version.c
@@ -772,6 +772,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1339,
+/**/
     1338,
 /**/
     1337,