added check on the class variable op in base class WorkspaceEmulator to make sure its not None before continuing
added check on the class variable op in base class WorkspaceEmulator to make sure its not None before continuing

pwns4cash/vivisect,HackerTool/vivisect,imjonsnooow/vivisect,cmaruti/vivisect,joshuahoman/vivisect,atlas0fd00m/vivisect,HackerTool/vivisect,bat-serjo/vivisect,vivisect/vivisect,HackerTool/vivisect,pwns4cash/vivisect,imjonsnooow/vivisect,vivisect/vivisect,joshuahoman/vivisect,pwns4cash/vivisect,cmaruti/vivisect,atlas0fd00m/vivisect,bat-serjo/vivisect,atlas0fd00m/vivisect,imjonsnooow/vivisect,bat-serjo/vivisect,vivisect/vivisect,joshuahoman/vivisect,cmaruti/vivisect