patch 8.0.1042: without the syntax feature highlighting doesn't work

Problem:    Without the syntax feature highlighting doesn't work.
Solution:   Always use unsigned short to store attributes.

src/version.c

@@ -769,6 +769,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1042,
 /**/
     1041,
 /**/