gatts_demo example: Use add_char_descr.attr_handle everywhere

examples/bluetooth/gatt_server/main/gatts_demo.c

@@ -455,7 +455,7 @@ static void gatts_profile_a_event_handler(esp_gatts_cb_event_t event, esp_gatt_i
         break;
     }
     case ESP_GATTS_ADD_CHAR_DESCR_EVT:
-        gl_profile_tab[PROFILE_A_APP_ID].descr_handle = param->add_char.attr_handle;
+        gl_profile_tab[PROFILE_A_APP_ID].descr_handle = param->add_char_descr.attr_handle;
         ESP_LOGI(GATTS_TAG, "ADD_DESCR_EVT, status %d, attr_handle %d, service_handle %d\n",
                  param->add_char_descr.status, param->add_char_descr.attr_handle, param->add_char_descr.service_handle);
         break;
@@ -608,7 +608,7 @@ static void gatts_profile_b_event_handler(esp_gatts_cb_event_t event, esp_gatt_i
                                      NULL, NULL);
         break;
     case ESP_GATTS_ADD_CHAR_DESCR_EVT:
-        gl_profile_tab[PROFILE_B_APP_ID].descr_handle = param->add_char.attr_handle;
+        gl_profile_tab[PROFILE_B_APP_ID].descr_handle = param->add_char_descr.attr_handle;
         ESP_LOGI(GATTS_TAG, "ADD_DESCR_EVT, status %d, attr_handle %d, service_handle %d\n",
                  param->add_char_descr.status, param->add_char_descr.attr_handle, param->add_char_descr.service_handle);
         break;