html5 audio: stop buffering data if playback is stopped (fixes #407)
html5 audio: stop buffering data if playback is stopped (fixes #407)

jfairley/clappr,clappr/clappr,MariadeAnton/clappr,Pyrotoxin/clappr,flavioribeiro/clappr,flavioribeiro/clappr,shakin/clappr,wxmfront/clappr,jfairley/clappr,MariadeAnton/clappr,tjenkinson/clappr,flavioribeiro/clappr,Metrakit/clappr,leandromoreira/clappr,leandromoreira/clappr,Pyrotoxin/clappr,burakkp/clappr,leandromoreira/clappr,dayvson/clappr,jfairley/clappr,shakin/clappr,burakkp/clappr,Metrakit/clappr,irongomme/clappr,wxmfront/clappr,tjenkinson/clappr,Peer5/clappr,dayvson/clappr,Metrakit/clappr,dayvson/clappr,kelonye/clappr,Pyrotoxin/clappr,MariadeAnton/clappr,shakin/clappr,Peer5/clappr,wxmfront/clappr,burakkp/clappr,tjenkinson/clappr,Peer5/clappr,clappr/clappr,irongomme/clappr,kelonye/clappr,kelonye/clappr,irongomme/clappr,clappr/clappr