patch 9.0.0128: Coverity complains about possible double free

Problem:    Coverity complains about possible double free.
Solution:   Clear the pointer to avoid warnings.
diff --git a/src/version.c b/src/version.c
index ac56f8c..f079d3c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -736,6 +736,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    128,
+/**/
     127,
 /**/
     126,