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,
 /**/

src/vim.h

@@ -435,13 +435,8 @@ typedef off_t off_T;
  * The characters and attributes cached for the screen.
  */
 typedef char_u schar_T;
-#ifdef FEAT_SYN_HL
 typedef unsigned short sattr_T;
 #define MAX_TYPENR 65535
-#else
-typedef unsigned char sattr_T;
-# define MAX_TYPENR 255
-#endif
 
 /*
  * The u8char_T can hold one decoded UTF-8 character.