Mouse coordinates in FrontEnd:OnMouseMove

Take a look the following example:

function FrontEnd:OnMouseMove(x,y)
	if global_error_widget ~= nil or self:GetFadeLevel() > 0 then
		return false
	end


	if self.lastx and self.lasty and self.lastx ~= x and self.lasty ~= y then
		self.tracking_mouse = true
	end

	self.lastx = x
	self.lasty = y
end

Don't you think, there should be "and (self.lastx ~= x or self.lasty ~= y)"?

It looks, like current implementation ignores straight mouse moves (i.e. when lastx is not equal to x AND y stays the same, or vice versa).