[shill] Set some WiFiService defaults

DBus-C++ is sensitive to bools being a non {0,1} value.

BUG=None
TEST=Unit, run on device see that there's no DBus abort after a minute or so

Change-Id: I58518ef7609dd02183a14728b1318be8299f4623
Reviewed-on: http://gerrit.chromium.org/gerrit/9988
Tested-by: Chris Masone <cmasone@chromium.org>
Reviewed-by: mukesh agrawal <quiche@chromium.org>
diff --git a/wifi_service.cc b/wifi_service.cc
index cd4cfe6..751cb36 100644
--- a/wifi_service.cc
+++ b/wifi_service.cc
@@ -36,8 +36,10 @@
                          const std::string &mode,
                          const std::string &security)
     : Service(control_interface, dispatcher, manager, flimflam::kTypeWifi),
+      need_passphrase_(false),
       security_(security),
       mode_(mode),
+      hidden_ssid_(false),
       task_factory_(this),
       wifi_(device),
       ssid_(ssid) {