patch 9.0.0429: not all keys are tested for the MS-Windows GUI

Problem:    Not all keys are tested for the MS-Windows GUI.
Solution:   Add more key codes to the list. (Yegappan Lakshmanan,
            closes #11097)
diff --git a/src/version.c b/src/version.c
index 4ba0b1e..ef5f102 100644
--- a/src/version.c
+++ b/src/version.c
@@ -704,6 +704,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    429,
+/**/
     428,
 /**/
     427,