When Trying to get StateVariable Value with DataType = uri the NULL is returned

Hi Satoshi,

following is my state variable.
When I try to get value using CGUPnpStateVariable it returns NULL.
<stateVariable sendEvents="no">
<name>HI_UPNP_VAR_VinpuServerURI</name>
<dataType>uri</dataType>
<defaultValue>Vinput://0.0.0.0:8822/</defaultValue>
</stateVariable>

Is there a way to get this ?
