Be sure to read options before to call trace_evaluate()

Otherwise in case we change an option with setoption and
then ask for "eval" command the evaluation is not updated.

Spotted by Justin Blanchard.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>

src/uci.cpp

@@ -97,7 +97,10 @@ bool execute_uci_command(const string& cmd) {
       pos.print();
 
   else if (token == "eval")
+  {
+      read_evaluation_uci_options(pos.side_to_move());
       cout << trace_evaluate(pos) << endl;
+  }
 
   else if (token == "key")
       cout << "key: " << hex     << pos.get_key()