tv_ctrlpt crashes after detecting a later version of tvcontrol service

SF Bug Tracker #118, Creator: T.Iwamoto

	From:  gon3456@users.sf.net
	Steps to reproduce:
	1. Extracts and build libupnp-1.6.18
	$ tar -xjf /path/to/archive/libupnp-1.6.18.tar.bz2
	$ cd libupnp-1.6.18
	$ ./configure
	$ make
	2. Applies the attached patch and remake.
	$ patch -p1 < /path/to/patch/libupnp-1.6.18.patch
	$ make
	3. Run tv_device.
	$ cd upnp/sample
	$ ./tv_device
	4. Run tv_ctrlpt; the tv_ctrlpt crashes soon.
	$ ./tv_ctrlpt
	Segmentation fault (core dumped)
	This is an issue report about the sample program of control point.
	The tv_ctrlpt crashes after detecting a tvdevice that contains tvcontrol:2 or higher version of tvcontrol service.
	tv_ctrlpt should detect correctly such devices due to forward compatibility of control points with device.
	For more information about the compatibility, please refer the following document:
	DLNA Architectures and Protocols Part 1 2011 December - 7.3.2.1.3 (GUN:GZJXU)
	The attached patch changes the sample programs as below:
	- device: changes version of tvcontrol service from 1 to 2. This change may occur in the future.
	- cp: nothing changed: cp knows version 1 of tvcontrol service only.
	I know many vendors implements their control points based on the tv_ctrlpt, so I hope to fix this issue ASAP.

	==

	From: Yoichi NAKAYAMA
	SEGV is caused by strcpy with NULL argument.
	Attached patch will avoid SEGV in strcpy, but there may be other inconsistencies.

	> I know many vendors implements their control points based on the tv_ctrlpt,

	I don't think so. I think tv_ctrlpt is just a sample to be used with tv_device.

Signed-off-by: Marcelo Roberto Jimenez <mroberto@users.sourceforge.net>
Fix return value check of parse_uri

Signed-off-by: Marcelo Roberto Jimenez <mroberto@users.sourceforge.net>