patch 8.1.0564: setting v:errors to wrong type still possible

Problem:    Setting v:errors to wrong type still possible.
Solution:   Return after giving an error message. (Christian Brabandt)
diff --git a/src/version.c b/src/version.c
index 474c96b..bc44242 100644
--- a/src/version.c
+++ b/src/version.c
@@ -793,6 +793,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    564,
+/**/
     563,
 /**/
     562,