Merge branch 'bugfix/gattc_example_strcmp' into 'master'

Fix device_name check in gatt_client example

`strcmp` was used against `adv_name` array, which was not a zero terminated string, causing `strcmp` check to fail for valid names.

Ref. #502

See merge request !652

examples/bluetooth/gatt_client/main/gattc_demo.c

@@ -318,8 +318,8 @@ static void esp_gap_cb(esp_gap_ble_cb_event_t event, esp_ble_gap_cb_param_t *par
             }
 
             if (adv_name != NULL) {
-                if (strcmp((char *)adv_name, device_name) == 0) {
-                    ESP_LOGI(GATTC_TAG, "Searched device %s", device_name);
+                if (strlen(device_name) == adv_name_len && strncmp((char *)adv_name, device_name, adv_name_len) == 0) {
+                    ESP_LOGI(GATTC_TAG, "Searched device %s\n", device_name);
                     if (connect == false) {
                         connect = true;
                         ESP_LOGI(GATTC_TAG, "Connect to the remote device.");