fixed dot radius bug per #208

lib/network/Node.js

@@ -179,7 +179,7 @@ Node.prototype.setProperties = function(properties, constants) {
   // individual shape properties
   if (properties.shape !== undefined)          {this.shape = properties.shape;}
   if (properties.image !== undefined)          {this.image = properties.image;}
-  if (properties.radius !== undefined)         {this.radius = properties.radius;}
+  if (properties.radius !== undefined)         {this.radius = properties.radius; this.baseRadiusValue = this.radius;}
   if (properties.color !== undefined)          {this.color = util.parseColor(properties.color);}
 
   if (properties.fontColor !== undefined)      {this.fontColor = properties.fontColor;}