Fix for rotating screen

-- snapshot:rotate(_currentAngle) didn't work, so.....

        if _directionNumber == 1 then
            if _previousDirection == 2 then
            snapshot:rotate(-90)
            end
            if _previousDirection == 3 then
            snapshot:rotate(180)
            end
            if _previousDirection == 4 then
            snapshot:rotate(90)
            end
        end

        if _directionNumber == 2 then
            if _previousDirection ==1 then
            snapshot:rotate( 90 )
            elseif _previousDirection ==4 then
            snapshot:rotate( -180 )
            elseif _previousDirection ==3 then
            snapshot:rotate( -90 )
            end
        end

        if _directionNumber == 3 then
            if _previousDirection == 2 then
            snapshot:rotate(90)
            end
            if _previousDirection == 4 then
            snapshot:rotate(-90)
            end
            if _previousDirection == 1 then
            snapshot:rotate(180)
            end
        end

        if _directionNumber == 4 then
            if _previousDirection == 3 then
            snapshot:rotate(90)
            end
            if _previousDirection == 1 then
            snapshot:rotate(-90)
            end
            if _previousDirection == 2 then
            snapshot:rotate(180)
            end
        end