Allow radius1 as an alias for radius in ol.style.RegularShape

When creating star symbols having radius1 and radius2 makes more sense as config options, hence the proposal to have radius1 be an alias for radius in ```ol.style.RegularShape```
yes I guess so, wondering why this wasn't caught in the testcase where I don't specify some of the config properties

Sent from my iPhone

> On 28 nov. 2014, at 21:14, Éric Lemoine <notifications@github.com> wrote:
> 
> In src/ol/style/regularshapestyle.js:
> 
> >  
> >    /**
> >     * @private
> >     * @type {number}
> >     */
> >    this.radius2_ =
> > -      goog.isDef(options.radius2) ? options.radius2 : options.radius;
> > +      goog.isDef(options.radius2) ? options.radius2 : this.radius_;
> radius2 should also be number|undefined in olx.js?
> 
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