patch 7.4.792

Problem:    Can only conceal text by defining syntax items.
Solution:   Use matchadd() to define concealing. (Christian Brabandt)

src/ex_docmd.c

@@ -12079,7 +12079,7 @@ ex_match(eap)
 
 	    c = *end;
 	    *end = NUL;
-	    match_add(curwin, g, p + 1, 10, id, NULL);
+	    match_add(curwin, g, p + 1, 10, id, NULL, NULL);
 	    vim_free(g);
 	    *end = c;
 	}