corrected error in via computation when no road was visible
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@ -80,7 +80,7 @@ drawDragMarker: function(event) {
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// get distance to route
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var minpoint = OSRM.G.route._current_route.route.closestLayerPoint( event.layerPoint );
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var min_dist = minpoint._sqDist;
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var min_dist = minpoint ? minpoint._sqDist : 1000;
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// get distance to markers
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var mouse = event.latlng;
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