Fix Issue #5 - build error when printing err in menu example
Fix Issue #5 - build error when printing err in menu example

nodar-chkuaselidze/goncurses,snuk182/goncurses,cha87de/goncurses,cha87de/goncurses,snuk182/goncurses,bluzye/goncurses,nodar-chkuaselidze/goncurses,aquarat/goncurses,aquarat/goncurses,bluzye/goncurses,cha87de/goncurses