Merge pull request #1714 from jbrowning/fix_callback_start_end_references

Clone start/end dates before passing to callback

Author: dangrossman

daterangepicker.js

@@ -1139,7 +1139,7 @@
 
             //if a new date range was selected, invoke the user callback function
             if (!this.startDate.isSame(this.oldStartDate) || !this.endDate.isSame(this.oldEndDate))
-                this.callback(this.startDate, this.endDate, this.chosenLabel);
+                this.callback(this.startDate.clone(), this.endDate.clone(), this.chosenLabel);
 
             //if picker is attached to a text input, update it
             this.updateElement();