patch 9.0.0554: using freed memory when command follows lambda

Problem:    Using freed memory when command follows lambda.
Solution:   Don't free what is still in use. (closes #11201)
diff --git a/src/version.c b/src/version.c
index 57d8259..23f822c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    554,
+/**/
     553,
 /**/
     552,