Small fix for the test

mysql-test/t/type_newdecimal.test:
  these lines work differently in ps-protocol mode so should always work in
  normal here

mysql-test/t/type_newdecimal.test

@@ -880,9 +880,10 @@ select 0/0;
 #
 # bug #9546
 #
+--disable_ps_protocol
 select 9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999 as x;
 select 9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999 + 1 as x;
-
+--enable_ps_protocol
 #
 # Bug #10004
 #