patch 9.0.1339: no test for :disassemble with class function

Problem:    No test for :disassemble with class function.
Solution:   Add a test.
diff --git a/src/version.c b/src/version.c
index 6b8e2bc..12e5fa1 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1339,
+/**/
     1338,
 /**/
     1337,