patch 8.0.0409: set_progpath is defined but not always used

Problem:    set_progpath is defined but not always used
Solution:   Adjust #ifdef.
diff --git a/src/version.c b/src/version.c
index 9b350e7..59ad156 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    409,
+/**/
     408,
 /**/
     407,