Write fatal errors even if silent is used in client_test

mysql-test/t/client_test.test:
  Fix crash when user has a conflicting defaults file
tests/client_test.c:
  Write fatal errors even if silent is used

mysql-test/t/client_test.test

 --disable_result_log
---exec $TESTS_BINDIR/client_test --testcase --user=root --socket=$MASTER_MYSOCK --port=$MYSQL_TCP_PORT --silent
+--exec $TESTS_BINDIR/client_test --no-defaults --testcase --user=root --socket=$MASTER_MYSOCK --port=$MYSQL_TCP_PORT --silent

tests/client_test.c

@@ -215,6 +215,7 @@ static void client_connect()
 
   if (!(mysql= mysql_init(NULL)))
   {
+    opt_silent= 0;
     myerror("mysql_init() failed");
     exit(1);
   }
@@ -223,6 +224,7 @@ static void client_connect()
                            opt_password, opt_db ? opt_db:"test", opt_port,
                            opt_unix_socket, 0)))
   {
+    opt_silent= 0;
     myerror("connection failed");
     mysql_close(mysql);
     fprintf(stdout, "\n Check the connection options using --help or -?\n");