patch 9.0.1535: test commented out in a wrong way

Problem:    Test commented out in a wrong way.
Solution:   Use legacy script comment character.
diff --git a/src/version.c b/src/version.c
index 1665096..8da355b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1535,
+/**/
     1534,
 /**/
     1533,