* GP_DEBUG now is only available if _GPHOTO2_INTERNAL_CODE is defined.
* _GPHOTO2_INTERNAL_CODE is defined via AM_CPPFLAGS, so all code should
be compiled correctly.
* Users of GP_DEBUG external to the gphoto project should use something
else.
git-svn-id: https://svn.code.sf.net/p/gphoto/code/trunk/libgphoto2@9265 67ed7778-7388-44ab-90cf-0a291f65f57c