Fix memleaks
Fix memleaks

PianoDestroyRequests overwrites the content of responseData. We have to
free it before that.

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