Remove superfluous get_mac_address call

Author: da-phil

src/WiFi.cpp

@@ -737,12 +737,11 @@ void WiFiClass::end()
 
 uint8_t *WiFiClass::macAddress(uint8_t *mac)
 {
-	m2m_wifi_get_mac_address(mac);
-	byte tmpMac[6], i;
+	byte tmpMac[6];
 
 	m2m_wifi_get_mac_address(tmpMac);
-	
-	for(i = 0; i < 6; i++)
+
+	for(int i = 0; i < 6; i++)
 		mac[i] = tmpMac[5-i];
 
 	return mac;