fix CI failed

- Refs about removing add_object_vtable:
https://gerrit.openbmc.org/c/openbmc/phosphor-hwmon/+/73009

- initial some struct data

Signed-off-by: Harvey Wu <Harvey.Wu@quantatw.com>
Change-Id: Iacc62eb1b8cd2b1e092efdbcb3abafb8afb896c7
diff --git a/dbus/dbushelper_interface.hpp b/dbus/dbushelper_interface.hpp
index 6d7e506..2ea6230 100644
--- a/dbus/dbushelper_interface.hpp
+++ b/dbus/dbushelper_interface.hpp
@@ -8,13 +8,13 @@
 
 struct SensorProperties
 {
-    int64_t scale;
-    double value;
-    double min;
-    double max;
+    int64_t scale = 0;
+    double value = 0.0;
+    double min = 0.0;
+    double max = 0.0;
     std::string unit;
-    bool available;
-    bool unavailableAsFailed;
+    bool available = false;
+    bool unavailableAsFailed = false;
 };
 
 class DbusHelperInterface