Fix to supress warning
Fix to supress warning

I think this little fix will clean up 

the 

Use of uninitialized value in concatenation (.) or string at /usr/lib/perl5/site_perl/5.8.8/Replay/Role/StorageEngine.pm line 237.

I am getting.

We know the value at the key is empty so just set the empty value in the return hash or array.
DavidIAm/Replay,DavidIAm/Replay