patch 8.1.1409: Coverity warns for using uninitialized memory

Problem:    Coverity warns for using uninitialized memory.
Solution:   Add a condition to clearing the growarray.
diff --git a/src/version.c b/src/version.c
index 5345a5f..b006864 100644
--- a/src/version.c
+++ b/src/version.c
@@ -768,6 +768,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1409,
+/**/
     1408,
 /**/
     1407,