moved cancel transfer from _exit to _close interrupt transfer can be done in sync fashion, it will call into  
moved cancel transfer from _exit to _close
interrupt transfer can be done in sync fashion, it will call into  


git-svn-id: 40dd595c6684d839db675001a64203a1457e7319@15389 67ed7778-7388-44ab-90cf-0a291f65f57c

thusoy/libgphoto2,msmeissn/libgphoto2,jbreeden/libgphoto2,jbreeden/libgphoto2,msmeissn/libgphoto2,thusoy/libgphoto2,gphoto/libgphoto2,gphoto/libgphoto2,thusoy/libgphoto2,thusoy/libgphoto2,msmeissn/libgphoto2,msmeissn/libgphoto2,gphoto/libgphoto2,jbreeden/libgphoto2,thusoy/libgphoto2,jbreeden/libgphoto2,gphoto/libgphoto2,jbreeden/libgphoto2,gphoto/libgphoto2,msmeissn/libgphoto2,gphoto/libgphoto2