slider: closestHandle never got set when the distance between the handles are the maximum available (fixes #3948)

1 files changed, 1 insertions, 1 deletions

diff --git a/ui/ui.slider.js b/ui/ui.slider.js
index 20a72c89c..838cc3295 100644
--- a/ui/ui.slider.js
+++ b/ui/ui.slider.js
@@ -185,7 +185,7 @@ $.widget("ui.slider", $.extend({}, $.ui.mouse, {
 		var position = { x: event.pageX, y: event.pageY };
 		var normValue = this._normValueFromMouse(position);
 
-		var distance = this._valueMax(), closestHandle;
+		var distance = this._valueMax() + 1, closestHandle;
 		var self = this, index;
 		this.handles.each(function(i) {
 			var thisDistance = Math.abs(normValue - self.values(i));