Well yes, but I assumed at least the door is an unused one. I'd be more concerned about the corner placement, and the left speaker having a curtain in front of it soaking up some of the treble output. Can't help feeling this system might sound rather boomy, and have some problems with stereo imaging.
Assuming the door isn't used, I'd suggest the speakers would perform much better a foot or two forward, and the same amount in from the side walls, too.