Fixed major issue when deleting a handle value whose key does not exist.
Fixed major issue when deleting a handle value whose key does not exist.

cookie33/B2HANDLE,merretbuurman/B2HANDLE,TobiasWeigel/B2HANDLE,TobiasWeigel/B2HANDLE,merretbuurman/B2HANDLE,EUDAT-B2SAFE/B2HANDLE,EUDAT-B2SAFE/B2HANDLE,cookie33/B2HANDLE