fixed double return error: bail from fullSync when not connected
fixed double return error: bail from fullSync when not connected

mcanthony/remotestorage.js,lewisl9029/remotestorage.js,theWebalyst/remotestorage.js,lewisl9029/remotestorage.js,remotestorage/remotestorage.js,untitaker/remotestorage.js,untitaker/remotestorage.js,mcanthony/remotestorage.js,remotestorage/remotestorage.js,remotestorage/remotestorage.js,theWebalyst/remotestorage.js