amend(ionRadio): make sure value is passed down always

Author: Ionitron

js/angular/directive/radio.js

@@ -32,15 +32,20 @@ IonicModule
     transclude: true,
     template: '<label class="item item-radio">' +
                 '<input type="radio" name="radio-group"' +
-                ' ng-model="ngModel" ng-value="ngValue" ng-change="ngChange()">' +
+                ' ng-model="ngModel" ng-value="getValue()" ng-change="ngChange()">' +
                 '<div class="item-content disable-pointer-events" ng-transclude></div>' +
                 '<i class="radio-icon disable-pointer-events icon ion-checkmark"></i>' +
               '</label>',
 
     compile: function(element, attr) {
       if(attr.name) element.children().eq(0).attr('name', attr.name);
       if(attr.icon) element.children().eq(2).removeClass('ion-checkmark').addClass(attr.icon);
-      if(attr.value) element.children().eq(0).attr('value', attr.value);
+
+      return function(scope, element, attr) {
+        scope.getValue = function() {
+          return scope.ngValue || attr.value;
+        };
+      };
     }
   };
 });