patch 7.4.1473

Problem:    Can't build without the autocommand feature.
Solution:   Add #ifdefs. (Yegappan Lakshmanan)

src/syntax.c

@@ -6342,9 +6342,11 @@ ex_ownsyntax(exarg_T *eap)
     if (old_value != NULL)
 	old_value = vim_strsave(old_value);
 
+#ifdef FEAT_AUTOCMD
     /* Apply the "syntax" autocommand event, this finds and loads the syntax
      * file. */
     apply_autocmds(EVENT_SYNTAX, eap->arg, curbuf->b_fname, TRUE, curbuf);
+#endif
 
     /* move value of b:current_syntax to w:current_syntax */
     new_value = get_var_value((char_u *)"b:current_syntax");