Unable to delete message thread if sender has special characters (like #)

What steps will reproduce the problem?
1. Receive a message from a sender with special characters in the name (like 
the #)
2.
3.

What is the expected output? What do you see instead?

I would expect the thread to be deleted, instead, nothing happens.

What version of the product are you using? On what device / operating
system?

Latest stable. Nexus 5, a recent OmniROM 4.4.4

Please provide any additional information below.

Original issue reported on code.google.com by htcmans...@gmail.com on 15 Mar 2015 at 9:29

NG-Studio-Development / csipsimple

Unable to delete message thread if sender has special characters (like #) #2914