net/nanocoap: check for payload marker when parse option
net/nanocoap: check for payload marker when parse option

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