fix bill

mallinkBApi/src/main/java/com/iformall/controller/WxBillController.java

@@ -142,6 +142,9 @@ public class WxBillController extends BaseController {
     	variablesList.add(billUpdateTypeMap);
     	
     	Integer needPay = (Integer) billObject.get("needPay");
+    	if (null == needPay) {
+    		needPay = 0;
+    	}
     	
     	Map oldPriceMap = new HashMap<String,Object>();
     	oldPriceMap.put("key","oldPrice");