patch 8.0.0170: crash in channel test

Problem:    Channel test fails for using freed memory.
Solution:   Fix memory use in json_decode().
diff --git a/src/version.c b/src/version.c
index 23dd5ae..4bc287f 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    170,
+/**/
     169,
 /**/
     168,