fix(options legend): fix #359 (#361)

Author: gaelollivier

dist/rzslider.css

@@ -1,7 +1,7 @@
 /*! angularjs-slider - v4.0.2 - 
  (c) Rafal Zajac <[email protected]>, Valentin Hervieu <[email protected]>, Jussi Saarivirta <[email protected]>, Angelin Sirbu <[email protected]> - 
  https://github.com/angular-slider/angularjs-slider - 
- 2016-06-29 */
+ 2016-06-30 */
 .rzslider {
   position: relative;
   display: inline-block;

dist/rzslider.js

@@ -1,7 +1,7 @@
 /*! angularjs-slider - v4.0.2 - 
  (c) Rafal Zajac <[email protected]>, Valentin Hervieu <[email protected]>, Jussi Saarivirta <[email protected]>, Angelin Sirbu <[email protected]> - 
  https://github.com/angular-slider/angularjs-slider - 
- 2016-06-29 */
+ 2016-06-30 */
 /*jslint unparam: true */
 /*global angular: false, console: false, define, module */
 (function(root, factory) {
@@ -533,9 +533,7 @@
               return String(value);
             };
 
-          if (this.options.getLegend) {
-            this.getLegend = this.options.getLegend;
-          }
+          this.getLegend = this.options.getLegend;
         }
 
         if (this.options.vertical) {

dist/rzslider.min.css

@@ -537,9 +537,7 @@
               return String(value);
             };
 
-          if (this.options.getLegend) {
-            this.getLegend = this.options.getLegend;
-          }
+          this.getLegend = this.options.getLegend;
         }
 
         if (this.options.vertical) {