patch 8.1.0427: MS-Windows GUI: using invalid encoded file name

Problem:    MS-Windows GUI: using invalid encoded file name.
Solution:   Drop the file name and return NULL. (Ken Takata, closes #3467)
diff --git a/src/version.c b/src/version.c
index 480c1ab..88163a2 100644
--- a/src/version.c
+++ b/src/version.c
@@ -795,6 +795,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    427,
+/**/
     426,
 /**/
     425,