bigint.test:

  Fixing a typo in the test case.

mysql-test/t/bigint.test

@@ -307,6 +307,6 @@ select -(9223372036854775808);
 select -((9223372036854775808));
 select -(-(9223372036854775808));
 --disable_metadata
---endble_ps_protocol
+--enable_ps_protocol
 select --9223372036854775808, ---9223372036854775808, ----9223372036854775808;
 select -(-9223372036854775808), -(-(-9223372036854775808));