patch 8.0.0462: failure of an MS-Windows test may go unnoticed

Problem:    If an MS-Windows tests succeeds at first and then fails in a way
            it does not produce a test.out file it looks like the test
            succeeded.
Solution:   Delete the previous output file.
diff --git a/src/version.c b/src/version.c
index 7f6d38f..ff1c9b8 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    462,
+/**/
     461,
 /**/
     460,