Complete the global state restoring function

When working with a dll, the API offers the possibility to return to a
previously stored global system state, enabling (infinite) undo
capability - yet to be implemented.

asn1_value_editor/sdlHandler.py

@@ -188,8 +188,11 @@ class sdlHandler(QObject):
                                     ctypes.POINTER(ctypes.c_uint32))
             setter_ptr(value_ptr)
         state_value = target_state[idx+1]
-        setter_state = getattr(self.dll, "_set_state")
+        print 'setting state back to', state_value
+        set_state = getattr(self.dll, "_set_state")
         # todo string to cyptes, and call setter_state
+        set_state(ctypes.c_char_p(state_value))
+        self.check_state()
         self.on_event()
 
     def on_event(self, tc_name=None, param=None):