get_wep_key
Description:
Parameters:
| this | |
| idx | 
           the WEP key index (0..3 inclusive)  | 
      
Returns:
| 
           the WEP key at the given index  | 
      
| this | |
| idx | 
           the WEP key index (0..3 inclusive)  | 
      
| 
           the WEP key at the given index  |