#8 do not show heading when heading="true"

[qxo]

This bug in here:
function sfwSuggest(instance, list)
{
//...
var heading = sfw[instance].suggestions.shift();
//...
}

function sfwShowOutput(instance)
{
if(typeof sfw[instance].suggestions != "undefined" &&
sfw[instance].suggestions.length){
sfw[instance].outputContainer.style.display = "block";
}
};

when list.length =1 and heading=true
now if just have sfw[instance].suggestions.length =0
so the result can not show.