[Blink] Relinquish camera when not used.

[José Ramón Muñoz Pekkarinen]

	Hi,

	I recently noticed that, when blink is open, no other process can use the 
camera, even though Blink doesn't use it at all. Is this the intended 
behaviour? I mean, it should be great to be able to use the camera, and if we 
cannot take it because of being used by a different process, simply don't used 
for the incoming call.

	My version is 1.4.1 over Gentoo Linux.

	Thanks!

	José.