When allocating a new event, if the same name is used, no allocation is
created and NULL is returned. We start trying to use the returned value
which seg-faulted. I added a check to only continue if the returned value
from the allocation is not NULL.
refs #149
Did two things to stop the crash. 1. When following an address path if we hit a NULL
address, stop processing and return the NULL. 2. When trying to resolve addresses in
copy_sim_data, if a NULL address is returned then reset the reference to unresolved and
return a dummy value.
Need to fix MTV to handle dummy value returns.
refs #117
Changed all header file once include variables to follow the same naming
convention and not start with any underscores. Also deleted old
incorrect copyright notices. Also removed $Id: tags from all files.
Fixes#14. Fixes#22.
