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

src/bacnet/basic/object/command.c

@@ -467,7 +467,7 @@ bool Command_Write_Property(BACNET_WRITE_PROPERTY_DATA *wp_data)
     bool status = false; /* return value */
     unsigned int object_index = 0;
     int len = 0;
-    BACNET_APPLICATION_DATA_VALUE value;
+    BACNET_APPLICATION_DATA_VALUE value = { 0 };
     /* decode the some of the request */
     len = bacapp_decode_application_data(
         wp_data->application_data, wp_data->application_data_len, &value);