Pull request #3248: KERNEL-11877 feat: container支持函数, 修复错误

Merge in VISUAL/fineui from ~DAILER/fineui:master to master

* commit '33ddf6e82e672a604deb90cef732d6ccd76f445f':
  KERNEL-11877 feat: container支持函数, 修复错误

src/base/combination/combo.js

@@ -219,7 +219,7 @@
                     },
                 },
             } : this.combo;
-            var positionRelativeElement = o.supportCSSTransform ? BI.DOM.getPositionRelativeContainingBlock(BI.Widget._renderEngine.createElement(BI.isFunction(o.container) ? o.container() : o.container)[0]) : null;
+            var positionRelativeElement = o.supportCSSTransform ? BI.DOM.getPositionRelativeContainingBlock(BI.isNull(o.container) ? this.element[0] : BI.Widget._renderEngine.createElement(BI.isFunction(o.container) ? o.container() : o.container)[0]) : null;
             switch (o.direction) {
                 case "bottom":
                 case "bottom,right":