idevicebackup2: Only post "sync finished" notification if we sent "sync start" earlier
idevicebackup2: Only post "sync finished" notification if we sent "sync start" earlier

Tatsh/libimobiledevice,libimobiledevice/libimobiledevice,Tatsh/libimobiledevice,patweb/libimobiledevice,patweb/libimobiledevice,libimobiledevice-win32/libimobiledevice,patweb/libimobiledevice,upbit/libimobiledevice,upbit/libimobiledevice,kalev/libimobiledevice,libimobiledevice-win32/libimobiledevice,kalev/libimobiledevice,upbit/libimobiledevice,kalev/libimobiledevice,Tatsh/libimobiledevice,libimobiledevice-win32/libimobiledevice,libimobiledevice/libimobiledevice,Tatsh/libimobiledevice,libimobiledevice-win32/libimobiledevice