patch 9.0.1340: Coverity warns for using NULL pointer

Problem:    Coverity warns for using NULL pointer.
Solution:   Check that lhs_type is not NULL.
diff --git a/src/version.c b/src/version.c
index 12e5fa1..c541e6f 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1340,
+/**/
     1339,
 /**/
     1338,