Fix bug on user center and message center. reviewed by redding.

@@ -18,6 +18,7 @@ const {
     MESSAGE_SYST_REQUEST,
     MESSAGE_SYST_SUCCESS,
     MESSAGE_SYST_FAILURE,
+    USER_DID_LOGOUT,
 
 
 } = require('../../constants/actionTypes').default;
@@ -29,6 +30,9 @@ export default function message(state = initialState, action) {
     if (!(state instanceof InitialState)) return initialState.merge(state);
 
     switch (action.type) {
+        case USER_DID_LOGOUT:
+            return initialState;
+            break;
         case GO_TO_SYS_MESSAGE: {
             let newSysMsg = new (Record({
                 timeagoStr: state.centerMsg.sysMsg.timeagoStr,