dbus: Fix WPS ProcessCredentials property setter to use Boolean

The incorrect type used with property setter call did not allow
the property to be modified.

wpa_supplicant/dbus/dbus_new_handlers_wps.c

@@ -313,7 +313,7 @@ DBusMessage * wpas_dbus_setter_process_credentials(
 	DBusMessage *reply = NULL;
 	dbus_bool_t process_credentials, old_pc;
 
-	reply = wpas_dbus_simple_property_setter(message, DBUS_TYPE_UINT32,
+	reply = wpas_dbus_simple_property_setter(message, DBUS_TYPE_BOOLEAN,
 						 &process_credentials);
 	if (reply)
 		return reply;