obexd: Remove transferred file only if the GET operation failed
obexd: Remove transferred file only if the GET operation failed

Since 9606375649e12f1b9f302bbb5bb8f87957387ddd xfer_complete() sets the
transfer status rather than the size. Adapt obc_transfer_free to check
for the completed status to avoid deletion of completed transfers.

mapfau/bluez,ComputeCycles/bluez,pstglia/external-bluetooth-bluez,ComputeCycles/bluez,mapfau/bluez,pkarasev3/bluez,silent-snowman/bluez,pstglia/external-bluetooth-bluez,pkarasev3/bluez,pkarasev3/bluez,ComputeCycles/bluez,pstglia/external-bluetooth-bluez,silent-snowman/bluez,mapfau/bluez,silent-snowman/bluez,mapfau/bluez,pstglia/external-bluetooth-bluez,silent-snowman/bluez,ComputeCycles/bluez,pkarasev3/bluez