if you can get those speakers out a couple of feet from the plane of the TV screen, which should be no problem at all if you have already pulled your speakers out into the room far enuf to enhance the sense of depth of image and avoid unwanted bass enhancement, I wouldn't do anything.
I second Newbee, I would add that if you can get at least two feet between the edge of your speaker and the TV then this will help a lot too (distance has a huge impact as sound spreads geometrically and therefore signal drops rapidly with distance). Placing the TV behind and more in the acoustic shadow of the speaker baffle edge will help too (although sound waves do go round corners too - at least the signal level will be further reduced.)
Placing the speaker with a few inches of the TV is a No no - the sharp TV edge and the small gap will interfere and may even collapse your soundstage so that you become aware that sound is coming from the speakers...
The perfect way to deal with the problem is to have a smooth flat surface or wall that holds your speakers and the flat TV screen - everything flush as can be - with smooth transitions and as little in the way of sharp edges as you can design - gaps should ideally be filled with acoustic foam/batting and a picture frame smooth transition between joints.