patch 9.0.1149: class members may be garbage collected

Problem:    Class members may be garbage collected.
Solution:   Mark class members as being in use.
diff --git a/src/version.c b/src/version.c
index a12cda2..d90b673 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1149,
+/**/
     1148,
 /**/
     1147,