patch 9.0.0009: going past the end of a menu item with only modifier

Problem:    Going past the end of a menu item with only modifier.
Solution:   Check for NUL.

src/version.c

@@ -735,6 +735,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    9,
 /**/
     8,
 /**/