Fix compilation with DISABLE_MAD/FAAD
Fix compilation with DISABLE_MAD/FAAD

Broken since d39745491dc911c7b7118402d640d54d50e845ab, fixes issue #51

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