Bugfix: handle the event where func_args doesn't have info for function when deleting.  currently, delFunction simply fails.
Bugfix: handle the event where func_args doesn't have info for function when deleting.  currently, delFunction simply fails.

vivisect/vivisect,bat-serjo/vivisect,cmaruti/vivisect,atlas0fd00m/vivisect,cmaruti/vivisect,vivisect/vivisect,atlas0fd00m/vivisect,vivisect/vivisect,atlas0fd00m/vivisect,bat-serjo/vivisect,bat-serjo/vivisect,cmaruti/vivisect