The structure contains details about the state table action that
was executed before the CloseEverything or ExitStateTable that resulted in
state table termination. 
 
- last_state_table 
- The name of the last state table executed.
- last_state_label 
- The label of the last state executed.
- last_action 
- The last state table action executed. See the actionedges.h header
file for the #define that corresponds to each action. file
- last_state_number 
- The position of last_action in the state table.
- return_edge 
- The result value of the last executed action in the state table. See the
actionedges.h header file for the #define that corresponds to each result
value.