patch 9.0.0499: in :def function list created after const is locked

Problem:    In :def function list created after const is locked.
Solution:   Reset v_lock. (closes #11154)
diff --git a/src/version.c b/src/version.c
index 16ba3ee..415897a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    499,
+/**/
     498,
 /**/
     497,