patch 9.0.0413: ASAN reports a memory leak

Problem:    ASAN reports a memory leak.
Solution:   Free the string received from the server. (Ken Takata,
            closes #11080)
diff --git a/src/version.c b/src/version.c
index e243a4f..bff11c7 100644
--- a/src/version.c
+++ b/src/version.c
@@ -704,6 +704,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    413,
+/**/
     412,
 /**/
     411,