fixed mac_mlme valgrind errors.

Change-Id: I8ad1fcf264ae799a0b5221928e9aa88dec6dead3

Author: Juha Heiskanen

test/nanostack/unittest/mac/mac_mlme/test_mac_mlme.c

@@ -1127,16 +1127,19 @@ bool test_mac_mlme_beacon_notify()
     memset(&setup, 0, sizeof(protocol_interface_rf_mac_setup_s));
     setup.tun_extension_rf_driver = NULL;
     mlme_beacon_ind_t data;
+    memset(&data, 0, sizeof(mlme_beacon_ind_t));
     mac_api_t api;
+    memset(&api, 0, sizeof(mac_api_t));
     api.mlme_ind_cb = &mlme_ind_callback;
     sw_mac_stub.mac_api_ptr = &api;
     mlme_scan_conf_t conf;
+    memset(&conf, 0, sizeof(mlme_scan_conf_t));
     setup.mac_mlme_scan_resp = &conf;
 
     //Test add_or_update_beacon here completely -->
     mlme_pan_descriptor_t desc1;
+    memset(&desc1, 0, sizeof(mlme_pan_descriptor_t));
     conf.PAN_values[0] = &desc1;
-    conf.PAN_values[1] = NULL;
     conf.ResultListSize = 2;
     desc1.LogicalChannel = 11;
     data.PANDescriptor.LogicalChannel = 11;
@@ -1147,11 +1150,13 @@ bool test_mac_mlme_beacon_notify()
     // Beacon data length doesn't contain FHSS synch info on single channel
     data.beacon_data_length = FHSS_SYNCH_INFO_START;
 
+    nsdynmemlib_stub.returnCounter = 0;
     //for loop covered here
     if(0 != mac_mlme_beacon_notify(&setup, &data)){
         return false;
     }
 
+    //Add First
     conf.PAN_values[0] = NULL;
     if(0 != mac_mlme_beacon_notify(&setup, &data)){
         return false;
@@ -1170,6 +1175,8 @@ bool test_mac_mlme_beacon_notify()
     }
 
     ns_dyn_mem_free(conf.PAN_values[2]);
+    conf.PAN_values[2] = NULL;
+    conf.ResultListSize = 2;
 
     // FHSS TESTS START
     setup.fhss_api = ns_fhss_create(0, 0);