patch 9.0.0405: arguments in a partial not used by a :def function

Problem:    Arguments in a partial not used by a :def function.
Solution:   Put the partial arguments on the stack.
diff --git a/src/version.c b/src/version.c
index 36ce07e..ff5fd12 100644
--- a/src/version.c
+++ b/src/version.c
@@ -704,6 +704,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    405,
+/**/
     404,
 /**/
     403,