Without this line compiler complains about :
Warning 22:9: warning: deleting object of polymorphic class type 'WiFiServer' which has non-virtual destructor might cause undefined behaviour [-Wdelete-non-virtual-dtor] \\Mac\Home\Documents\Visual Studio 2015\Projects\BlinkESP8266_12\ActAsWiFi_server\SVServer.cpp 22
Reason for this is that I would like to init WiFiServer with port which can by dynamically chosen (for example by serial port)
internalServer = new WiFiServer(port);