flash playback: make all calls to external interfaces safe
flash playback: make all calls to external interfaces safe

Conflicts:
	src/plugins/flash_playback/flash_playback.js

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