Datepicker: avoid ambiguous + ++ in min file. Partial fix for #5576 - invalid increment operand

Author: rdworth

ui/jquery.ui.datepicker.js

@@ -153,8 +153,10 @@ $.extend(Datepicker.prototype, {
 		}
 		var nodeName = target.nodeName.toLowerCase();
 		var inline = (nodeName == 'div' || nodeName == 'span');
-		if (!target.id)
-			target.id = 'dp' + (++this.uuid);
+		if (!target.id) {
+			this.uuid += 1;
+			target.id = 'dp' + this.uuid;
+		}
 		var inst = this._newInst($(target), inline);
 		inst.settings = $.extend({}, settings || {}, inlineSettings || {});
 		if (nodeName == 'input') {
@@ -285,7 +287,8 @@ $.extend(Datepicker.prototype, {
 	_dialogDatepicker: function(input, date, onSelect, settings, pos) {
 		var inst = this._dialogInst; // internal instance
 		if (!inst) {
-			var id = 'dp' + (++this.uuid);
+			this.uuid += 1;
+			var id = 'dp' + this.uuid;
 			this._dialogInput = $('<input type="text" id="' + id +
 				'" style="position: absolute; top: -100px; width: 0px; z-index: -10;"/>');
 			this._dialogInput.keydown(this._doKeyDown);