Improved error checking on return from canon_{usb,serial}_dialogue() calls and changed some functions to return GP_ codes instead of hard coded integer values.
Improved error checking on return from canon_{usb,serial}_dialogue() calls
and changed some functions to return GP_ codes instead of hard coded
integer values.


git-svn-id: 40dd595c6684d839db675001a64203a1457e7319@3392 67ed7778-7388-44ab-90cf-0a291f65f57c

gphoto/libgphoto2.OLDMIGRATION,gphoto/libgphoto2.OLDMIGRATION,gphoto/libgphoto2.OLDMIGRATION,gphoto/libgphoto2.OLDMIGRATION