The epic level feat Spell Accuracy from the PHB says:
Benefit: You can omit a number of squares from the area of effect of any of your area or close wizard powers. This number can’t exceed your Wisdom modifier.
Wall is defined under "Areas of Effect" on page 272 of the PHB along with bursts and blasts, but it carries the following condition:
Each square of the wall must share a side—not just a corner—with at least one other square of the wall...
Does the feat override that requirement for the wall?
For example, say I have a Wisdom modifier of +3. Can I use Spell Accuracy to create a 3 square gap in the middle of my 8 square long Wall of Fire so I don't kill the unconscious, dying paladin in the middle?