Slider: Count the handles after setting up a range. Fixes #7922 - Sli…

…der with range doesn't work if values are not set.

ui/jquery.ui.slider.js

@@ -36,11 +36,10 @@ $.widget( "ui.slider", $.ui.mouse, {
 	},
 
 	_create: function() {
-		var i,
+		var i, handleCount,
 			o = this.options,
 			existingHandles = this.element.find( ".ui-slider-handle" ).addClass( "ui-state-default ui-corner-all" ),
 			handle = "<a class='ui-slider-handle ui-state-default ui-corner-all' href='#'></a>",
-			handleCount = ( o.values && o.values.length ) || 1,
 			handles = [];
 
 		this._keySliding = false;
@@ -79,6 +78,8 @@ $.widget( "ui.slider", $.ui.mouse, {
 				( ( o.range === "min" || o.range === "max" ) ? " ui-slider-range-" + o.range : "" ) );
 		}
 
+		handleCount = ( o.values && o.values.length ) || 1;
+
 		for ( i = existingHandles.length; i < handleCount; i++ ) {
 			handles.push( handle );
 		}