When KUrlNavigator is initialized using KUrlNavigator::initialize with a url containg redundant ('/') say
/home/user///folder then KUrlNavigator::updateButtons stops creating buttons as soon as redundancy occurs.
Here if we consider the above path then KUrlNavigator will create buttons till "user" and not for "folder"

Reproducible: Always

Steps to Reproduce:
1.Use the testcase for KUrlNavigator in kio/tests. 
2.in KUrlNavigator's constructor pass a url like "/path/to/local///folder/subfolder"
3.

Actual Results:  
If we consider the steps above then KUrlNavigator will initialize in breadcrumb view with the indication "path>to>local"

Expected Results:  
The navigation indication should be "path>to>local>folder>subfolder>".