obexd: Fix callback logic in EDS PBAP
obexd: Fix callback logic in EDS PBAP

It seems that e_book_cancel (in libebook) is broken -- it should return
TRUE when request is canceled and FALSE otherwise, but after
"successfully" canceling async request, supplied callback is still
called without any error.

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