cpu/esp32: esp_wifi doesn't call memcpy if iol_len is 0
cpu/esp32: esp_wifi doesn't call memcpy if iol_len is 0


miri64/RIOT,OlegHahm/RIOT,mfrey/RIOT,ant9000/RIOT,lazytech-org/RIOT,jasonatran/RIOT,toonst/RIOT,jasonatran/RIOT,miri64/RIOT,kaspar030/RIOT,yogo1212/RIOT,RIOT-OS/RIOT,mtausig/RIOT,kYc0o/RIOT,x3ro/RIOT,kYc0o/RIOT,aeneby/RIOT,jasonatran/RIOT,jasonatran/RIOT,miri64/RIOT,toonst/RIOT,smlng/RIOT,yogo1212/RIOT,aeneby/RIOT,aeneby/RIOT,rfuentess/RIOT,jasonatran/RIOT,cladmi/RIOT,OTAkeys/RIOT,kYc0o/RIOT,basilfx/RIOT,ant9000/RIOT,RIOT-OS/RIOT,x3ro/RIOT,yogo1212/RIOT,lazytech-org/RIOT,ant9000/RIOT,cladmi/RIOT,authmillenon/RIOT,toonst/RIOT,lazytech-org/RIOT,rfuentess/RIOT,x3ro/RIOT,yogo1212/RIOT,smlng/RIOT,aeneby/RIOT,kYc0o/RIOT,OlegHahm/RIOT,OTAkeys/RIOT,cladmi/RIOT,kaspar030/RIOT,toonst/RIOT,rfuentess/RIOT,yogo1212/RIOT,miri64/RIOT,yogo1212/RIOT,authmillenon/RIOT,RIOT-OS/RIOT,cladmi/RIOT,mtausig/RIOT,mtausig/RIOT,mfrey/RIOT,mtausig/RIOT,basilfx/RIOT,smlng/RIOT,josephnoir/RIOT,kaspar030/RIOT,x3ro/RIOT,kaspar030/RIOT,miri64/RIOT,authmillenon/RIOT,cladmi/RIOT,authmillenon/RIOT,mfrey/RIOT,RIOT-OS/RIOT,mtausig/RIOT,basilfx/RIOT,lazytech-org/RIOT,x3ro/RIOT,josephnoir/RIOT,rfuentess/RIOT,OTAkeys/RIOT,OlegHahm/RIOT,authmillenon/RIOT,mfrey/RIOT,ant9000/RIOT,lazytech-org/RIOT,basilfx/RIOT,smlng/RIOT,smlng/RIOT,OTAkeys/RIOT,josephnoir/RIOT,ant9000/RIOT,OlegHahm/RIOT,toonst/RIOT,authmillenon/RIOT,josephnoir/RIOT,josephnoir/RIOT,OlegHahm/RIOT,rfuentess/RIOT,kYc0o/RIOT,basilfx/RIOT,OTAkeys/RIOT,aeneby/RIOT,kaspar030/RIOT,mfrey/RIOT,RIOT-OS/RIOT