Fixed BACNET_APPLICATION_DATA_VALUE declarations to be initialized so that the next pointer is NULL by default. (#814)

src/bacnet/basic/object/nc.c

@@ -295,7 +295,7 @@ bool Notification_Class_Write_Property(BACNET_WRITE_PROPERTY_DATA *wp_data)
 {
     NOTIFICATION_CLASS_INFO *CurrentNotify;
     NOTIFICATION_CLASS_INFO TmpNotify;
-    BACNET_APPLICATION_DATA_VALUE value;
+    BACNET_APPLICATION_DATA_VALUE value = { 0 };
     uint8_t TmpPriority[MAX_BACNET_EVENT_TRANSITION]; /* BACnetARRAY[3] of
                                                          Unsigned */
     bool status = false;