piano: Use faster hex2int conversion
piano: Use faster hex2int conversion

gnowxilef/pianobar,Vi1i/pianobarfly,gnowxilef/pianobar,johndeeney/pianobar,tchajed/pianobar,gnowxilef/pianobar,johndeeney/pianobar,twahlfeld/pianobar,bmbove/pianobar-save,tchajed/pianobar,twahlfeld/pianobar,bmbove/pianobar-save,twahlfeld/pianobar,tchajed/pianobar,johndeeney/pianobar,DavidZemon/pianobar,gnowxilef/pianobar,johnso51/pianobar,Vi1i/pianobarfly,johnso51/pianobar,johnso51/pianobar,bmbove/pianobar-save,johndeeney/pianobar,Vi1i/pianobarfly,twahlfeld/pianobar,DavidZemon/pianobar,twahlfeld/pianobar,johnso51/pianobar,tchajed/pianobar,gnowxilef/pianobar,twahlfeld/pianobar,johnso51/pianobar,bmbove/pianobar-save,DavidZemon/pianobar,Vi1i/pianobarfly,johnso51/pianobar,DavidZemon/pianobar,DavidZemon/pianobar,bmbove/pianobar-save,tchajed/pianobar,gnowxilef/pianobar,johndeeney/pianobar,Vi1i/pianobarfly,tchajed/pianobar,johndeeney/pianobar,DavidZemon/pianobar